diff --git a/src/osgPlugins/ive/AlphaFunc.h b/src/osgPlugins/ive/AlphaFunc.h
index ef3a27bb1..d3d08c802 100644
--- a/src/osgPlugins/ive/AlphaFunc.h
+++ b/src/osgPlugins/ive/AlphaFunc.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-  class AlphaFunc : public osg::AlphaFunc, public ReadWrite {
+  class AlphaFunc : public osg::AlphaFunc {
   public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/AnimationPath.h b/src/osgPlugins/ive/AnimationPath.h
index f839ea1c7..af542db52 100644
--- a/src/osgPlugins/ive/AnimationPath.h
+++ b/src/osgPlugins/ive/AnimationPath.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class AnimationPath : public osg::AnimationPath, public ReadWrite {
+class AnimationPath : public osg::AnimationPath {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/AnimationPathCallback.h b/src/osgPlugins/ive/AnimationPathCallback.h
index 4e34f3df5..3544c1afd 100644
--- a/src/osgPlugins/ive/AnimationPathCallback.h
+++ b/src/osgPlugins/ive/AnimationPathCallback.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class AnimationPathCallback : public osg::AnimationPathCallback, public ReadWrite {
+class AnimationPathCallback : public osg::AnimationPathCallback {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/AnisotropicLighting.h b/src/osgPlugins/ive/AnisotropicLighting.h
index a56d19311..c3467b110 100644
--- a/src/osgPlugins/ive/AnisotropicLighting.h
+++ b/src/osgPlugins/ive/AnisotropicLighting.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class AnisotropicLighting : public osgFX::AnisotropicLighting, public ReadWrite {
+class AnisotropicLighting : public osgFX::AnisotropicLighting {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/AutoTransform.h b/src/osgPlugins/ive/AutoTransform.h
index 5fae4df99..06e9b1084 100644
--- a/src/osgPlugins/ive/AutoTransform.h
+++ b/src/osgPlugins/ive/AutoTransform.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class AutoTransform : public osg::AutoTransform, public ReadWrite {
+class AutoTransform : public osg::AutoTransform {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/AzimElevationSector.h b/src/osgPlugins/ive/AzimElevationSector.h
index 0f6ef7722..3228113d2 100644
--- a/src/osgPlugins/ive/AzimElevationSector.h
+++ b/src/osgPlugins/ive/AzimElevationSector.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class AzimElevationSector : public osgSim::AzimElevationSector, public ReadWrite {
+class AzimElevationSector : public osgSim::AzimElevationSector {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/AzimSector.h b/src/osgPlugins/ive/AzimSector.h
index f428b8ef8..2a3553890 100644
--- a/src/osgPlugins/ive/AzimSector.h
+++ b/src/osgPlugins/ive/AzimSector.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class AzimSector : public osgSim::AzimSector, public ReadWrite {
+class AzimSector : public osgSim::AzimSector {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Billboard.h b/src/osgPlugins/ive/Billboard.h
index 0237b6ffb..accc68889 100644
--- a/src/osgPlugins/ive/Billboard.h
+++ b/src/osgPlugins/ive/Billboard.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Billboard : public osg::Billboard, public ReadWrite {
+class Billboard : public osg::Billboard {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/BlendColor.h b/src/osgPlugins/ive/BlendColor.h
index 7315d01c9..aa7e51456 100644
--- a/src/osgPlugins/ive/BlendColor.h
+++ b/src/osgPlugins/ive/BlendColor.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-   class BlendColor : public osg::BlendColor, public ReadWrite {
+   class BlendColor : public osg::BlendColor {
        public:
            void write(DataOutputStream* out);
            void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/BlendEquation.h b/src/osgPlugins/ive/BlendEquation.h
index d883819d2..b6346256d 100644
--- a/src/osgPlugins/ive/BlendEquation.h
+++ b/src/osgPlugins/ive/BlendEquation.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class BlendEquation : public osg::BlendEquation, public ReadWrite {
+class BlendEquation : public osg::BlendEquation {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/BlendFunc.h b/src/osgPlugins/ive/BlendFunc.h
index 9aef5f6f2..702b860f8 100644
--- a/src/osgPlugins/ive/BlendFunc.h
+++ b/src/osgPlugins/ive/BlendFunc.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class BlendFunc : public osg::BlendFunc, public ReadWrite {
+class BlendFunc : public osg::BlendFunc {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/BlinkSequence.h b/src/osgPlugins/ive/BlinkSequence.h
index e2442de0a..1532dc023 100644
--- a/src/osgPlugins/ive/BlinkSequence.h
+++ b/src/osgPlugins/ive/BlinkSequence.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class BlinkSequence : public osgSim::BlinkSequence, public ReadWrite {
+class BlinkSequence : public osgSim::BlinkSequence {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/BumpMapping.h b/src/osgPlugins/ive/BumpMapping.h
index 24560e06a..ddb9b3313 100644
--- a/src/osgPlugins/ive/BumpMapping.h
+++ b/src/osgPlugins/ive/BumpMapping.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class BumpMapping : public osgFX::BumpMapping, public ReadWrite {
+class BumpMapping : public osgFX::BumpMapping {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Camera.h b/src/osgPlugins/ive/Camera.h
index 1a0e2fd41..4593165e5 100644
--- a/src/osgPlugins/ive/Camera.h
+++ b/src/osgPlugins/ive/Camera.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Camera : public osg::Camera, public ReadWrite {
+class Camera : public osg::Camera {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/CameraView.h b/src/osgPlugins/ive/CameraView.h
index 3e9710bff..0d4fa3a94 100644
--- a/src/osgPlugins/ive/CameraView.h
+++ b/src/osgPlugins/ive/CameraView.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class CameraView : public osg::CameraView, public ReadWrite {
+class CameraView : public osg::CameraView {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Cartoon.h b/src/osgPlugins/ive/Cartoon.h
index c5ab8aad7..e79221f39 100644
--- a/src/osgPlugins/ive/Cartoon.h
+++ b/src/osgPlugins/ive/Cartoon.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Cartoon : public osgFX::Cartoon, public ReadWrite {
+class Cartoon : public osgFX::Cartoon {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ClipNode.h b/src/osgPlugins/ive/ClipNode.h
index 9b53e006f..468cc2f48 100644
--- a/src/osgPlugins/ive/ClipNode.h
+++ b/src/osgPlugins/ive/ClipNode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ClipNode : public osg::ClipNode, public ReadWrite {
+class ClipNode : public osg::ClipNode {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ClipPlane.h b/src/osgPlugins/ive/ClipPlane.h
index 0c234638a..bc78eea4f 100644
--- a/src/osgPlugins/ive/ClipPlane.h
+++ b/src/osgPlugins/ive/ClipPlane.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-  class ClipPlane : public osg::ClipPlane, public ReadWrite {
+  class ClipPlane : public osg::ClipPlane {
   public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ClusterCullingCallback.h b/src/osgPlugins/ive/ClusterCullingCallback.h
index 6a9278bb9..fbb1f370d 100644
--- a/src/osgPlugins/ive/ClusterCullingCallback.h
+++ b/src/osgPlugins/ive/ClusterCullingCallback.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ClusterCullingCallback : public osg::ClusterCullingCallback, public ReadWrite {
+class ClusterCullingCallback : public osg::ClusterCullingCallback {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ColorMask.h b/src/osgPlugins/ive/ColorMask.h
index c607d5868..3d4b1b2af 100644
--- a/src/osgPlugins/ive/ColorMask.h
+++ b/src/osgPlugins/ive/ColorMask.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ColorMask : public osg::ColorMask, public ReadWrite {
+class ColorMask : public osg::ColorMask {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/CompositeLayer.h b/src/osgPlugins/ive/CompositeLayer.h
index 63425f3b9..243f26a89 100644
--- a/src/osgPlugins/ive/CompositeLayer.h
+++ b/src/osgPlugins/ive/CompositeLayer.h
@@ -7,7 +7,7 @@
 namespace ive
 {
 
-class CompositeLayer : public osgTerrain::CompositeLayer, public ReadWrite
+class CompositeLayer : public osgTerrain::CompositeLayer
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/ConeSector.h b/src/osgPlugins/ive/ConeSector.h
index c56e21ba6..6450a3115 100644
--- a/src/osgPlugins/ive/ConeSector.h
+++ b/src/osgPlugins/ive/ConeSector.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ConeSector : public osgSim::ConeSector, public ReadWrite {
+class ConeSector : public osgSim::ConeSector {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ConvexPlanarOccluder.h b/src/osgPlugins/ive/ConvexPlanarOccluder.h
index cc6afb79b..85ebb6ccb 100644
--- a/src/osgPlugins/ive/ConvexPlanarOccluder.h
+++ b/src/osgPlugins/ive/ConvexPlanarOccluder.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ConvexPlanarOccluder : public osg::ConvexPlanarOccluder, public ReadWrite {
+class ConvexPlanarOccluder : public osg::ConvexPlanarOccluder {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ConvexPlanarPolygon.h b/src/osgPlugins/ive/ConvexPlanarPolygon.h
index 26c4945d8..042340f21 100644
--- a/src/osgPlugins/ive/ConvexPlanarPolygon.h
+++ b/src/osgPlugins/ive/ConvexPlanarPolygon.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ConvexPlanarPolygon : public osg::ConvexPlanarPolygon, public ReadWrite {
+class ConvexPlanarPolygon : public osg::ConvexPlanarPolygon {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/CoordinateSystemNode.h b/src/osgPlugins/ive/CoordinateSystemNode.h
index d65eaf35d..fc9b9c68c 100644
--- a/src/osgPlugins/ive/CoordinateSystemNode.h
+++ b/src/osgPlugins/ive/CoordinateSystemNode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class CoordinateSystemNode : public osg::CoordinateSystemNode, public ReadWrite {
+class CoordinateSystemNode : public osg::CoordinateSystemNode {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/CullFace.h b/src/osgPlugins/ive/CullFace.h
index 58c943b26..f0d2bce41 100644
--- a/src/osgPlugins/ive/CullFace.h
+++ b/src/osgPlugins/ive/CullFace.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class CullFace : public osg::CullFace, public ReadWrite {
+class CullFace : public osg::CullFace {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DOFTransform.h b/src/osgPlugins/ive/DOFTransform.h
index 57b6d9a35..4b994f15c 100644
--- a/src/osgPlugins/ive/DOFTransform.h
+++ b/src/osgPlugins/ive/DOFTransform.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DOFTransform : public osgSim::DOFTransform, public ReadWrite {
+class DOFTransform : public osgSim::DOFTransform {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Depth.h b/src/osgPlugins/ive/Depth.h
index 97d7ee4a5..de22e54fc 100644
--- a/src/osgPlugins/ive/Depth.h
+++ b/src/osgPlugins/ive/Depth.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Depth : public osg::Depth, public ReadWrite {
+class Depth : public osg::Depth {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DirectionalSector.h b/src/osgPlugins/ive/DirectionalSector.h
index d268030b7..4a141da39 100644
--- a/src/osgPlugins/ive/DirectionalSector.h
+++ b/src/osgPlugins/ive/DirectionalSector.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DirectionalSector : public osgSim::DirectionalSector, public ReadWrite {
+class DirectionalSector : public osgSim::DirectionalSector {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DrawArrayLengths.h b/src/osgPlugins/ive/DrawArrayLengths.h
index 922608250..d2679998b 100644
--- a/src/osgPlugins/ive/DrawArrayLengths.h
+++ b/src/osgPlugins/ive/DrawArrayLengths.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DrawArrayLengths : public osg::DrawArrayLengths, public ReadWrite {
+class DrawArrayLengths : public osg::DrawArrayLengths {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DrawArrays.h b/src/osgPlugins/ive/DrawArrays.h
index 4ec059cd1..c8ce11928 100644
--- a/src/osgPlugins/ive/DrawArrays.h
+++ b/src/osgPlugins/ive/DrawArrays.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DrawArrays : public ReadWrite, public osg::DrawArrays{
+class DrawArrays : public osg::DrawArrays{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DrawElementsUByte.h b/src/osgPlugins/ive/DrawElementsUByte.h
index d6e1ebeda..40708a944 100644
--- a/src/osgPlugins/ive/DrawElementsUByte.h
+++ b/src/osgPlugins/ive/DrawElementsUByte.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DrawElementsUByte : public osg::DrawElementsUByte, public ReadWrite {
+class DrawElementsUByte : public osg::DrawElementsUByte {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DrawElementsUInt.h b/src/osgPlugins/ive/DrawElementsUInt.h
index 43f98c35e..ec06023de 100644
--- a/src/osgPlugins/ive/DrawElementsUInt.h
+++ b/src/osgPlugins/ive/DrawElementsUInt.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DrawElementsUInt : public osg::DrawElementsUInt, public ReadWrite {
+class DrawElementsUInt : public osg::DrawElementsUInt {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/DrawElementsUShort.h b/src/osgPlugins/ive/DrawElementsUShort.h
index e7c1a67f9..be393186a 100644
--- a/src/osgPlugins/ive/DrawElementsUShort.h
+++ b/src/osgPlugins/ive/DrawElementsUShort.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class DrawElementsUShort : public osg::DrawElementsUShort, public ReadWrite {
+class DrawElementsUShort : public osg::DrawElementsUShort {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Drawable.h b/src/osgPlugins/ive/Drawable.h
index d60a66aec..3935028f4 100644
--- a/src/osgPlugins/ive/Drawable.h
+++ b/src/osgPlugins/ive/Drawable.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Drawable : public ReadWrite, public osg::Drawable{
+class Drawable : public osg::Drawable{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Effect.h b/src/osgPlugins/ive/Effect.h
index 929abf15e..821505e43 100644
--- a/src/osgPlugins/ive/Effect.h
+++ b/src/osgPlugins/ive/Effect.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Effect : public osgFX::Effect, public ReadWrite {
+class Effect : public osgFX::Effect {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ElevationSector.h b/src/osgPlugins/ive/ElevationSector.h
index af99810e4..a27094c31 100644
--- a/src/osgPlugins/ive/ElevationSector.h
+++ b/src/osgPlugins/ive/ElevationSector.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ElevationSector : public osgSim::ElevationSector, public ReadWrite {
+class ElevationSector : public osgSim::ElevationSector {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/EllipsoidModel.h b/src/osgPlugins/ive/EllipsoidModel.h
index 2162245d0..b66acfaba 100644
--- a/src/osgPlugins/ive/EllipsoidModel.h
+++ b/src/osgPlugins/ive/EllipsoidModel.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class EllipsoidModel : public osg::EllipsoidModel, public ReadWrite {
+class EllipsoidModel : public osg::EllipsoidModel {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/FadeText.h b/src/osgPlugins/ive/FadeText.h
index 255c7c2f8..58d4bf160 100644
--- a/src/osgPlugins/ive/FadeText.h
+++ b/src/osgPlugins/ive/FadeText.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class FadeText : public osgText::FadeText, public ReadWrite {
+class FadeText : public osgText::FadeText {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Fog.h b/src/osgPlugins/ive/Fog.h
index 431b28450..796a795e4 100644
--- a/src/osgPlugins/ive/Fog.h
+++ b/src/osgPlugins/ive/Fog.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-  class Fog : public osg::Fog, public ReadWrite {
+  class Fog : public osg::Fog {
   public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/FragmentProgram.h b/src/osgPlugins/ive/FragmentProgram.h
index 399ad4767..8c17c57da 100644
--- a/src/osgPlugins/ive/FragmentProgram.h
+++ b/src/osgPlugins/ive/FragmentProgram.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class FragmentProgram : public osg::FragmentProgram, public ReadWrite {
+class FragmentProgram : public osg::FragmentProgram {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/FrontFace.h b/src/osgPlugins/ive/FrontFace.h
index 5c99d7ead..19453208b 100644
--- a/src/osgPlugins/ive/FrontFace.h
+++ b/src/osgPlugins/ive/FrontFace.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class FrontFace : public osg::FrontFace, public ReadWrite {
+class FrontFace : public osg::FrontFace {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Geode.h b/src/osgPlugins/ive/Geode.h
index 5841969f7..da39c7c86 100644
--- a/src/osgPlugins/ive/Geode.h
+++ b/src/osgPlugins/ive/Geode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Geode : public ReadWrite, public osg::Geode{
+class Geode : public osg::Geode{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Geometry.h b/src/osgPlugins/ive/Geometry.h
index e203faef6..327b95ac1 100644
--- a/src/osgPlugins/ive/Geometry.h
+++ b/src/osgPlugins/ive/Geometry.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Geometry : public ReadWrite, public deprecated_osg::Geometry {
+class Geometry : public deprecated_osg::Geometry {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Group.h b/src/osgPlugins/ive/Group.h
index f2cd2117a..a40fa881d 100644
--- a/src/osgPlugins/ive/Group.h
+++ b/src/osgPlugins/ive/Group.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Group : public osg::Group, public ReadWrite{
+class Group : public osg::Group{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* out);
diff --git a/src/osgPlugins/ive/HeightFieldLayer.h b/src/osgPlugins/ive/HeightFieldLayer.h
index 7aafb88cd..b8bfbdac9 100644
--- a/src/osgPlugins/ive/HeightFieldLayer.h
+++ b/src/osgPlugins/ive/HeightFieldLayer.h
@@ -20,7 +20,7 @@
 namespace ive
 {
 
-class HeightFieldLayer : public osgTerrain::HeightFieldLayer, public ReadWrite
+class HeightFieldLayer : public osgTerrain::HeightFieldLayer
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/Image.h b/src/osgPlugins/ive/Image.h
index 07b8c62b5..121fcfe6c 100644
--- a/src/osgPlugins/ive/Image.h
+++ b/src/osgPlugins/ive/Image.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Image : public osg::Image, public ReadWrite {
+class Image : public osg::Image {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ImageLayer.h b/src/osgPlugins/ive/ImageLayer.h
index a7243471e..88ae60751 100644
--- a/src/osgPlugins/ive/ImageLayer.h
+++ b/src/osgPlugins/ive/ImageLayer.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class ImageLayer : public osgTerrain::ImageLayer, public ReadWrite
+class ImageLayer : public osgTerrain::ImageLayer
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/ImageSequence.h b/src/osgPlugins/ive/ImageSequence.h
index 0f6311995..b9d606b33 100644
--- a/src/osgPlugins/ive/ImageSequence.h
+++ b/src/osgPlugins/ive/ImageSequence.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ImageSequence : public osg::ImageSequence, public ReadWrite {
+class ImageSequence : public osg::ImageSequence {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Impostor.h b/src/osgPlugins/ive/Impostor.h
index 43b97b79b..cbc83a438 100644
--- a/src/osgPlugins/ive/Impostor.h
+++ b/src/osgPlugins/ive/Impostor.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Impostor : public osgSim::Impostor, public ReadWrite {
+class Impostor : public osgSim::Impostor {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LOD.h b/src/osgPlugins/ive/LOD.h
index 4917c799e..8d0b1a8fe 100644
--- a/src/osgPlugins/ive/LOD.h
+++ b/src/osgPlugins/ive/LOD.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class LOD : public osg::LOD, public ReadWrite {
+class LOD : public osg::LOD {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Layer.h b/src/osgPlugins/ive/Layer.h
index a333de3de..35232796d 100644
--- a/src/osgPlugins/ive/Layer.h
+++ b/src/osgPlugins/ive/Layer.h
@@ -33,7 +33,7 @@ class LayerHelper
         osgTerrain::Locator* readLocator(DataInputStream* in);
 };
 
-class Layer : public osgTerrain::Layer, public ReadWrite
+class Layer : public osgTerrain::Layer
 {
     public:
     void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/Light.h b/src/osgPlugins/ive/Light.h
index 033e10708..3b94d78b8 100644
--- a/src/osgPlugins/ive/Light.h
+++ b/src/osgPlugins/ive/Light.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Light : public osg::Light, public ReadWrite {
+class Light : public osg::Light {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LightModel.h b/src/osgPlugins/ive/LightModel.h
index 6e92a09de..b4a0414b1 100644
--- a/src/osgPlugins/ive/LightModel.h
+++ b/src/osgPlugins/ive/LightModel.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-  class LightModel : public osg::LightModel, public ReadWrite {
+  class LightModel : public osg::LightModel {
   public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LightPoint.h b/src/osgPlugins/ive/LightPoint.h
index 8382a0e59..54c469c18 100644
--- a/src/osgPlugins/ive/LightPoint.h
+++ b/src/osgPlugins/ive/LightPoint.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class LightPoint : public osgSim::LightPoint, public ReadWrite {
+class LightPoint : public osgSim::LightPoint {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LightPointNode.h b/src/osgPlugins/ive/LightPointNode.h
index 7c5f29b7c..613c8bc20 100644
--- a/src/osgPlugins/ive/LightPointNode.h
+++ b/src/osgPlugins/ive/LightPointNode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class LightPointNode : public osgSim::LightPointNode, public ReadWrite {
+class LightPointNode : public osgSim::LightPointNode {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LightSource.h b/src/osgPlugins/ive/LightSource.h
index b03b8afb7..153176534 100644
--- a/src/osgPlugins/ive/LightSource.h
+++ b/src/osgPlugins/ive/LightSource.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class LightSource : public osg::LightSource, public ReadWrite {
+class LightSource : public osg::LightSource {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LineStipple.h b/src/osgPlugins/ive/LineStipple.h
index 78f2e39e6..da904b904 100644
--- a/src/osgPlugins/ive/LineStipple.h
+++ b/src/osgPlugins/ive/LineStipple.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class LineStipple : public osg::LineStipple, public ReadWrite {
+class LineStipple : public osg::LineStipple {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/LineWidth.h b/src/osgPlugins/ive/LineWidth.h
index f99c8bae7..768089156 100644
--- a/src/osgPlugins/ive/LineWidth.h
+++ b/src/osgPlugins/ive/LineWidth.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class LineWidth : public osg::LineWidth, public ReadWrite {
+class LineWidth : public osg::LineWidth {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Locator.h b/src/osgPlugins/ive/Locator.h
index ac13ab742..f34722331 100644
--- a/src/osgPlugins/ive/Locator.h
+++ b/src/osgPlugins/ive/Locator.h
@@ -18,7 +18,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Locator : public osgTerrain::Locator, public ReadWrite {
+class Locator : public osgTerrain::Locator {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Material.h b/src/osgPlugins/ive/Material.h
index 341708e33..ec97bd43d 100644
--- a/src/osgPlugins/ive/Material.h
+++ b/src/osgPlugins/ive/Material.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Material : public osg::Material, public ReadWrite {
+class Material : public osg::Material {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/MatrixTransform.h b/src/osgPlugins/ive/MatrixTransform.h
index 1b59cafb8..3ee6ade19 100644
--- a/src/osgPlugins/ive/MatrixTransform.h
+++ b/src/osgPlugins/ive/MatrixTransform.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class MatrixTransform : public osg::MatrixTransform, public ReadWrite {
+class MatrixTransform : public osg::MatrixTransform {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/MultiSwitch.h b/src/osgPlugins/ive/MultiSwitch.h
index c1ae42d25..0f7eac00d 100644
--- a/src/osgPlugins/ive/MultiSwitch.h
+++ b/src/osgPlugins/ive/MultiSwitch.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class MultiSwitch : public osgSim::MultiSwitch, public ReadWrite {
+class MultiSwitch : public osgSim::MultiSwitch {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/MultiTextureControl.h b/src/osgPlugins/ive/MultiTextureControl.h
index d2e87d747..674467c50 100644
--- a/src/osgPlugins/ive/MultiTextureControl.h
+++ b/src/osgPlugins/ive/MultiTextureControl.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class MultiTextureControl : public osgFX::MultiTextureControl, public ReadWrite {
+class MultiTextureControl : public osgFX::MultiTextureControl {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Multisample.h b/src/osgPlugins/ive/Multisample.h
index 0ea45775a..29aad2d8a 100644
--- a/src/osgPlugins/ive/Multisample.h
+++ b/src/osgPlugins/ive/Multisample.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Multisample : public osg::Multisample, public ReadWrite {
+class Multisample : public osg::Multisample {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Node.h b/src/osgPlugins/ive/Node.h
index 3f7b37fad..fce58bc27 100644
--- a/src/osgPlugins/ive/Node.h
+++ b/src/osgPlugins/ive/Node.h
@@ -6,7 +6,7 @@
 #include <iostream>
 
 namespace ive{
-class Node :  public osg::Node, public ReadWrite{
+class Node :  public osg::Node{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Object.h b/src/osgPlugins/ive/Object.h
index dcde6115c..c33c0e58e 100644
--- a/src/osgPlugins/ive/Object.h
+++ b/src/osgPlugins/ive/Object.h
@@ -7,7 +7,7 @@
 
 namespace ive{
 
-class Object : public ReadWrite, public osg::Object{
+class Object : public osg::Object{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* out);
diff --git a/src/osgPlugins/ive/OccluderNode.h b/src/osgPlugins/ive/OccluderNode.h
index 7e560f654..885ce621b 100644
--- a/src/osgPlugins/ive/OccluderNode.h
+++ b/src/osgPlugins/ive/OccluderNode.h
@@ -6,7 +6,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class OccluderNode : public osg::OccluderNode, public ReadWrite {
+class OccluderNode : public osg::OccluderNode {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/OcclusionQueryNode.h b/src/osgPlugins/ive/OcclusionQueryNode.h
index 6ad0c9348..2886237af 100644
--- a/src/osgPlugins/ive/OcclusionQueryNode.h
+++ b/src/osgPlugins/ive/OcclusionQueryNode.h
@@ -6,7 +6,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class OcclusionQueryNode : public osg::OcclusionQueryNode, public ReadWrite {
+class OcclusionQueryNode : public osg::OcclusionQueryNode {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PagedLOD.h b/src/osgPlugins/ive/PagedLOD.h
index f2c88ff5d..ca58daefe 100644
--- a/src/osgPlugins/ive/PagedLOD.h
+++ b/src/osgPlugins/ive/PagedLOD.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PagedLOD : public osg::PagedLOD, public ReadWrite {
+class PagedLOD : public osg::PagedLOD {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Point.h b/src/osgPlugins/ive/Point.h
index 84d2354f2..25f1e29f5 100644
--- a/src/osgPlugins/ive/Point.h
+++ b/src/osgPlugins/ive/Point.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Point : public osg::Point, public ReadWrite {
+class Point : public osg::Point {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PointSprite.h b/src/osgPlugins/ive/PointSprite.h
index 53ae8f21d..05bdd9b42 100644
--- a/src/osgPlugins/ive/PointSprite.h
+++ b/src/osgPlugins/ive/PointSprite.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PointSprite : public osg::PointSprite, public ReadWrite {
+class PointSprite : public osg::PointSprite {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PolygonMode.h b/src/osgPlugins/ive/PolygonMode.h
index b5f3c441d..1298f03cc 100644
--- a/src/osgPlugins/ive/PolygonMode.h
+++ b/src/osgPlugins/ive/PolygonMode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PolygonMode : public osg::PolygonMode, public ReadWrite {
+class PolygonMode : public osg::PolygonMode {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PolygonOffset.h b/src/osgPlugins/ive/PolygonOffset.h
index 9751ffe29..5f08ca1cd 100644
--- a/src/osgPlugins/ive/PolygonOffset.h
+++ b/src/osgPlugins/ive/PolygonOffset.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PolygonOffset : public osg::PolygonOffset, public ReadWrite {
+class PolygonOffset : public osg::PolygonOffset {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PolygonStipple.h b/src/osgPlugins/ive/PolygonStipple.h
index b3badf1e4..d21b4566e 100644
--- a/src/osgPlugins/ive/PolygonStipple.h
+++ b/src/osgPlugins/ive/PolygonStipple.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PolygonStipple : public osg::PolygonStipple, public ReadWrite {
+class PolygonStipple : public osg::PolygonStipple {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PositionAttitudeTransform.h b/src/osgPlugins/ive/PositionAttitudeTransform.h
index b38d31973..04f25f7e5 100644
--- a/src/osgPlugins/ive/PositionAttitudeTransform.h
+++ b/src/osgPlugins/ive/PositionAttitudeTransform.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PositionAttitudeTransform : public osg::PositionAttitudeTransform, public ReadWrite {
+class PositionAttitudeTransform : public osg::PositionAttitudeTransform {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/PrimitiveSet.h b/src/osgPlugins/ive/PrimitiveSet.h
index 04202d461..e3daf8438 100644
--- a/src/osgPlugins/ive/PrimitiveSet.h
+++ b/src/osgPlugins/ive/PrimitiveSet.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class PrimitiveSet : public ReadWrite, public osg::PrimitiveSet{
+class PrimitiveSet : public osg::PrimitiveSet{
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Program.h b/src/osgPlugins/ive/Program.h
index 856c2d40a..8005673df 100644
--- a/src/osgPlugins/ive/Program.h
+++ b/src/osgPlugins/ive/Program.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Program : public osg::Program, public ReadWrite {
+class Program : public osg::Program {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ProxyNode.h b/src/osgPlugins/ive/ProxyNode.h
index 7beefc920..761c23f97 100644
--- a/src/osgPlugins/ive/ProxyNode.h
+++ b/src/osgPlugins/ive/ProxyNode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ProxyNode : public osg::ProxyNode, public ReadWrite {
+class ProxyNode : public osg::ProxyNode {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ReadWrite.h b/src/osgPlugins/ive/ReadWrite.h
index 73e22b016..e12c600d3 100644
--- a/src/osgPlugins/ive/ReadWrite.h
+++ b/src/osgPlugins/ive/ReadWrite.h
@@ -179,9 +179,5 @@ namespace ive {
 #define IVETEXT3D                       0x10000002
 #define IVEFADETEXT                     0x10000003
 
-class ReadWrite{
-public:
-};
-
 }
 #endif // IVE_READWRITE
diff --git a/src/osgPlugins/ive/Scissor.h b/src/osgPlugins/ive/Scissor.h
index 51784a84b..9a2670cde 100644
--- a/src/osgPlugins/ive/Scissor.h
+++ b/src/osgPlugins/ive/Scissor.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Scissor : public osg::Scissor, public ReadWrite {
+class Scissor : public osg::Scissor {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Scribe.h b/src/osgPlugins/ive/Scribe.h
index 6964f3be1..0f3a2bb78 100644
--- a/src/osgPlugins/ive/Scribe.h
+++ b/src/osgPlugins/ive/Scribe.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Scribe : public osgFX::Scribe, public ReadWrite {
+class Scribe : public osgFX::Scribe {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Sequence.h b/src/osgPlugins/ive/Sequence.h
index 61655d610..f2ef07ece 100644
--- a/src/osgPlugins/ive/Sequence.h
+++ b/src/osgPlugins/ive/Sequence.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Sequence : public osg::Sequence, public ReadWrite {
+class Sequence : public osg::Sequence {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ShadeModel.h b/src/osgPlugins/ive/ShadeModel.h
index 113d46dce..c201ed64a 100644
--- a/src/osgPlugins/ive/ShadeModel.h
+++ b/src/osgPlugins/ive/ShadeModel.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ShadeModel : public osg::ShadeModel, public ReadWrite {
+class ShadeModel : public osg::ShadeModel {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Shader.h b/src/osgPlugins/ive/Shader.h
index 1d25349d7..6e9222127 100644
--- a/src/osgPlugins/ive/Shader.h
+++ b/src/osgPlugins/ive/Shader.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Shader : public osg::Shader, public ReadWrite {
+class Shader : public osg::Shader {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Shape.h b/src/osgPlugins/ive/Shape.h
index 0f453d67b..2f3e92a1f 100644
--- a/src/osgPlugins/ive/Shape.h
+++ b/src/osgPlugins/ive/Shape.h
@@ -6,37 +6,37 @@
 
 namespace ive{
 
-class Sphere : public osg::Sphere, public ReadWrite {
+class Sphere : public osg::Sphere {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
 };
 
-class Box : public osg::Box, public ReadWrite {
+class Box : public osg::Box {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
 };
 
-class Cone : public osg::Cone, public ReadWrite {
+class Cone : public osg::Cone {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
 };
 
-class Cylinder : public osg::Cylinder, public ReadWrite {
+class Cylinder : public osg::Cylinder {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
 };
 
-class Capsule : public osg::Capsule, public ReadWrite {
+class Capsule : public osg::Capsule {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
 };
 
-class HeightField : public osg::HeightField, public ReadWrite {
+class HeightField : public osg::HeightField {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ShapeAttributeList.h b/src/osgPlugins/ive/ShapeAttributeList.h
index 6aac4d988..a26b3aafd 100644
--- a/src/osgPlugins/ive/ShapeAttributeList.h
+++ b/src/osgPlugins/ive/ShapeAttributeList.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ShapeAttributeList : public osgSim::ShapeAttributeList, public ReadWrite {
+class ShapeAttributeList : public osgSim::ShapeAttributeList {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/ShapeDrawable.h b/src/osgPlugins/ive/ShapeDrawable.h
index 8e0645d9f..5487a9ecc 100644
--- a/src/osgPlugins/ive/ShapeDrawable.h
+++ b/src/osgPlugins/ive/ShapeDrawable.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class ShapeDrawable : public osg::ShapeDrawable, public ReadWrite {
+class ShapeDrawable : public osg::ShapeDrawable {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/SpecularHighlights.h b/src/osgPlugins/ive/SpecularHighlights.h
index 919d9814e..df8e527dc 100644
--- a/src/osgPlugins/ive/SpecularHighlights.h
+++ b/src/osgPlugins/ive/SpecularHighlights.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class SpecularHighlights : public osgFX::SpecularHighlights, public ReadWrite {
+class SpecularHighlights : public osgFX::SpecularHighlights {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/StateSet.h b/src/osgPlugins/ive/StateSet.h
index 204af7802..706751f13 100644
--- a/src/osgPlugins/ive/StateSet.h
+++ b/src/osgPlugins/ive/StateSet.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class StateSet : public ReadWrite, public osg::StateSet{
+class StateSet : public osg::StateSet {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* out);
diff --git a/src/osgPlugins/ive/Stencil.h b/src/osgPlugins/ive/Stencil.h
index 8fec542fd..b1fa44973 100644
--- a/src/osgPlugins/ive/Stencil.h
+++ b/src/osgPlugins/ive/Stencil.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Stencil : public osg::Stencil, public ReadWrite {
+class Stencil : public osg::Stencil {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/StencilTwoSided.h b/src/osgPlugins/ive/StencilTwoSided.h
index 496954471..5de53da86 100644
--- a/src/osgPlugins/ive/StencilTwoSided.h
+++ b/src/osgPlugins/ive/StencilTwoSided.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class StencilTwoSided : public osg::StencilTwoSided, public ReadWrite {
+class StencilTwoSided : public osg::StencilTwoSided {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Switch.h b/src/osgPlugins/ive/Switch.h
index d34c31e30..79f95b287 100644
--- a/src/osgPlugins/ive/Switch.h
+++ b/src/osgPlugins/ive/Switch.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Switch : public osg::Switch, public ReadWrite {
+class Switch : public osg::Switch {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/SwitchLayer.h b/src/osgPlugins/ive/SwitchLayer.h
index 05f4dcacc..5e6e2c513 100644
--- a/src/osgPlugins/ive/SwitchLayer.h
+++ b/src/osgPlugins/ive/SwitchLayer.h
@@ -7,7 +7,7 @@
 namespace ive
 {
 
-class SwitchLayer : public osgTerrain::SwitchLayer, public ReadWrite
+class SwitchLayer : public osgTerrain::SwitchLayer
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/Terrain.h b/src/osgPlugins/ive/Terrain.h
index d8d3dc46b..d39cab77b 100644
--- a/src/osgPlugins/ive/Terrain.h
+++ b/src/osgPlugins/ive/Terrain.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class Terrain : public osgTerrain::Terrain, public ReadWrite
+class Terrain : public osgTerrain::Terrain
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/TerrainTile.h b/src/osgPlugins/ive/TerrainTile.h
index 37444ebae..328de1a44 100644
--- a/src/osgPlugins/ive/TerrainTile.h
+++ b/src/osgPlugins/ive/TerrainTile.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class TerrainTile : public osgTerrain::TerrainTile, public ReadWrite
+class TerrainTile : public osgTerrain::TerrainTile
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/TexEnv.h b/src/osgPlugins/ive/TexEnv.h
index bf6a6ba08..42cc26e35 100644
--- a/src/osgPlugins/ive/TexEnv.h
+++ b/src/osgPlugins/ive/TexEnv.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class TexEnv : public osg::TexEnv, public ReadWrite {
+class TexEnv : public osg::TexEnv {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/TexEnvCombine.h b/src/osgPlugins/ive/TexEnvCombine.h
index 35b4576b5..9515537da 100644
--- a/src/osgPlugins/ive/TexEnvCombine.h
+++ b/src/osgPlugins/ive/TexEnvCombine.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class TexEnvCombine : public osg::TexEnvCombine, public ReadWrite {
+class TexEnvCombine : public osg::TexEnvCombine {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/TexGen.h b/src/osgPlugins/ive/TexGen.h
index 141989271..30cff3489 100644
--- a/src/osgPlugins/ive/TexGen.h
+++ b/src/osgPlugins/ive/TexGen.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class TexGen : public osg::TexGen, public ReadWrite {
+class TexGen : public osg::TexGen {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/TexGenNode.h b/src/osgPlugins/ive/TexGenNode.h
index 47ee0e010..297f657e7 100644
--- a/src/osgPlugins/ive/TexGenNode.h
+++ b/src/osgPlugins/ive/TexGenNode.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class TexGenNode : public osg::TexGenNode, public ReadWrite {
+class TexGenNode : public osg::TexGenNode {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/TexMat.h b/src/osgPlugins/ive/TexMat.h
index 5eaed11b2..a2ad7a444 100644
--- a/src/osgPlugins/ive/TexMat.h
+++ b/src/osgPlugins/ive/TexMat.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class TexMat : public osg::TexMat, public ReadWrite {
+class TexMat : public osg::TexMat {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Text.h b/src/osgPlugins/ive/Text.h
index 93c9f1bbb..724a606cc 100644
--- a/src/osgPlugins/ive/Text.h
+++ b/src/osgPlugins/ive/Text.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Text : public osgText::Text, public ReadWrite {
+class Text : public osgText::Text {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Text3D.h b/src/osgPlugins/ive/Text3D.h
index 405c949b9..fabf45f8d 100644
--- a/src/osgPlugins/ive/Text3D.h
+++ b/src/osgPlugins/ive/Text3D.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Text3D : public osgText::Text3D, public ReadWrite {
+class Text3D : public osgText::Text3D {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Texture.h b/src/osgPlugins/ive/Texture.h
index 9e779aab0..e9ab55662 100644
--- a/src/osgPlugins/ive/Texture.h
+++ b/src/osgPlugins/ive/Texture.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Texture : public osg::Texture, public ReadWrite {
+class Texture : public osg::Texture {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Texture1D.h b/src/osgPlugins/ive/Texture1D.h
index 9de0996fc..e7c75b8c1 100644
--- a/src/osgPlugins/ive/Texture1D.h
+++ b/src/osgPlugins/ive/Texture1D.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Texture1D : public osg::Texture1D, public ReadWrite {
+class Texture1D : public osg::Texture1D {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Texture2D.h b/src/osgPlugins/ive/Texture2D.h
index 2047b4ac1..18f15830f 100644
--- a/src/osgPlugins/ive/Texture2D.h
+++ b/src/osgPlugins/ive/Texture2D.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Texture2D : public osg::Texture2D, public ReadWrite {
+class Texture2D : public osg::Texture2D {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Texture2DArray.h b/src/osgPlugins/ive/Texture2DArray.h
index 55c71c102..a163c27bf 100644
--- a/src/osgPlugins/ive/Texture2DArray.h
+++ b/src/osgPlugins/ive/Texture2DArray.h
@@ -7,7 +7,7 @@
 namespace ive
 {
 
-class Texture2DArray : public osg::Texture2DArray, public ReadWrite
+class Texture2DArray : public osg::Texture2DArray
 {
 public:
     void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/Texture3D.h b/src/osgPlugins/ive/Texture3D.h
index 2d6c7fed5..56493d37a 100644
--- a/src/osgPlugins/ive/Texture3D.h
+++ b/src/osgPlugins/ive/Texture3D.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Texture3D : public osg::Texture3D, public ReadWrite {
+class Texture3D : public osg::Texture3D {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/TextureCubeMap.h b/src/osgPlugins/ive/TextureCubeMap.h
index a3bfda496..0bc6bdd53 100644
--- a/src/osgPlugins/ive/TextureCubeMap.h
+++ b/src/osgPlugins/ive/TextureCubeMap.h
@@ -7,7 +7,7 @@
 namespace ive
 {
 
-class TextureCubeMap : public osg::TextureCubeMap, public ReadWrite
+class TextureCubeMap : public osg::TextureCubeMap
 {
 public:
     void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/TextureRectangle.h b/src/osgPlugins/ive/TextureRectangle.h
index 39eec7b74..64a2a8e97 100644
--- a/src/osgPlugins/ive/TextureRectangle.h
+++ b/src/osgPlugins/ive/TextureRectangle.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class TextureRectangle : public osg::TextureRectangle, public ReadWrite {
+class TextureRectangle : public osg::TextureRectangle {
 public:
     void write(DataOutputStream* out);
     void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Transform.h b/src/osgPlugins/ive/Transform.h
index b5a51ef69..a050329a5 100644
--- a/src/osgPlugins/ive/Transform.h
+++ b/src/osgPlugins/ive/Transform.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Transform : public osg::Transform, public ReadWrite {
+class Transform : public osg::Transform {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Uniform.h b/src/osgPlugins/ive/Uniform.h
index 16b6bf853..ba11f2496 100644
--- a/src/osgPlugins/ive/Uniform.h
+++ b/src/osgPlugins/ive/Uniform.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Uniform : public osg::Uniform, public ReadWrite {
+class Uniform : public osg::Uniform {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/VertexProgram.h b/src/osgPlugins/ive/VertexProgram.h
index 96121c443..69c91ca30 100644
--- a/src/osgPlugins/ive/VertexProgram.h
+++ b/src/osgPlugins/ive/VertexProgram.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class VertexProgram : public osg::VertexProgram, public ReadWrite {
+class VertexProgram : public osg::VertexProgram {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Viewport.h b/src/osgPlugins/ive/Viewport.h
index bd8d9c506..3c2acb2c8 100644
--- a/src/osgPlugins/ive/Viewport.h
+++ b/src/osgPlugins/ive/Viewport.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class Viewport : public osg::Viewport, public ReadWrite {
+class Viewport : public osg::Viewport {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/VisibilityGroup.h b/src/osgPlugins/ive/VisibilityGroup.h
index 4c467e54d..68e711113 100644
--- a/src/osgPlugins/ive/VisibilityGroup.h
+++ b/src/osgPlugins/ive/VisibilityGroup.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class VisibilityGroup : public osgSim::VisibilityGroup, public ReadWrite {
+class VisibilityGroup : public osgSim::VisibilityGroup {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/Volume.h b/src/osgPlugins/ive/Volume.h
index 5d0e3ab27..5aec05c76 100644
--- a/src/osgPlugins/ive/Volume.h
+++ b/src/osgPlugins/ive/Volume.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class Volume : public osgVolume::Volume, public ReadWrite
+class Volume : public osgVolume::Volume
 {
 public:
     void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeCompositeLayer.h b/src/osgPlugins/ive/VolumeCompositeLayer.h
index 567bef11e..c511ae2c5 100644
--- a/src/osgPlugins/ive/VolumeCompositeLayer.h
+++ b/src/osgPlugins/ive/VolumeCompositeLayer.h
@@ -7,7 +7,7 @@
 namespace ive
 {
 
-class VolumeCompositeLayer : public osgVolume::CompositeLayer, public ReadWrite
+class VolumeCompositeLayer : public osgVolume::CompositeLayer
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeCompositeProperty.h b/src/osgPlugins/ive/VolumeCompositeProperty.h
index ec0ce6083..be38d8011 100644
--- a/src/osgPlugins/ive/VolumeCompositeProperty.h
+++ b/src/osgPlugins/ive/VolumeCompositeProperty.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class VolumeCompositeProperty : public osgVolume::CompositeProperty, public ReadWrite
+class VolumeCompositeProperty : public osgVolume::CompositeProperty
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeImageLayer.h b/src/osgPlugins/ive/VolumeImageLayer.h
index 29a1a09d4..7206f4172 100644
--- a/src/osgPlugins/ive/VolumeImageLayer.h
+++ b/src/osgPlugins/ive/VolumeImageLayer.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class VolumeImageLayer : public osgVolume::ImageLayer, public ReadWrite
+class VolumeImageLayer : public osgVolume::ImageLayer
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeLayer.h b/src/osgPlugins/ive/VolumeLayer.h
index 04da2dea1..b1bca9343 100644
--- a/src/osgPlugins/ive/VolumeLayer.h
+++ b/src/osgPlugins/ive/VolumeLayer.h
@@ -20,7 +20,7 @@
 namespace ive
 {
 
-class VolumeLayer : public osgVolume::Layer, public ReadWrite
+class VolumeLayer : public osgVolume::Layer
 {
     public:
     void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeLocator.h b/src/osgPlugins/ive/VolumeLocator.h
index d26e3d99b..d0ade1d0c 100644
--- a/src/osgPlugins/ive/VolumeLocator.h
+++ b/src/osgPlugins/ive/VolumeLocator.h
@@ -18,7 +18,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class VolumeLocator : public osgVolume::Locator, public ReadWrite {
+class VolumeLocator : public osgVolume::Locator {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/VolumeProperty.h b/src/osgPlugins/ive/VolumeProperty.h
index 04da2dea1..b1bca9343 100644
--- a/src/osgPlugins/ive/VolumeProperty.h
+++ b/src/osgPlugins/ive/VolumeProperty.h
@@ -20,7 +20,7 @@
 namespace ive
 {
 
-class VolumeLayer : public osgVolume::Layer, public ReadWrite
+class VolumeLayer : public osgVolume::Layer
 {
     public:
     void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumePropertyAdjustmentCallback.h b/src/osgPlugins/ive/VolumePropertyAdjustmentCallback.h
index f3c839b18..02ef8b869 100644
--- a/src/osgPlugins/ive/VolumePropertyAdjustmentCallback.h
+++ b/src/osgPlugins/ive/VolumePropertyAdjustmentCallback.h
@@ -5,7 +5,7 @@
 #include "ReadWrite.h"
 
 namespace ive{
-class VolumePropertyAdjustmentCallback : public osgVolume::PropertyAdjustmentCallback, public ReadWrite {
+class VolumePropertyAdjustmentCallback : public osgVolume::PropertyAdjustmentCallback {
 public:
 	void write(DataOutputStream* out);
 	void read(DataInputStream* in);
diff --git a/src/osgPlugins/ive/VolumeScalarProperty.h b/src/osgPlugins/ive/VolumeScalarProperty.h
index 5cab12aa9..0e658c2a0 100644
--- a/src/osgPlugins/ive/VolumeScalarProperty.h
+++ b/src/osgPlugins/ive/VolumeScalarProperty.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class VolumeScalarProperty : public osgVolume::ScalarProperty, public ReadWrite
+class VolumeScalarProperty : public osgVolume::ScalarProperty
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeSwitchProperty.h b/src/osgPlugins/ive/VolumeSwitchProperty.h
index 170a8b9fd..012eb3b81 100644
--- a/src/osgPlugins/ive/VolumeSwitchProperty.h
+++ b/src/osgPlugins/ive/VolumeSwitchProperty.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class VolumeSwitchProperty : public osgVolume::SwitchProperty, public ReadWrite
+class VolumeSwitchProperty : public osgVolume::SwitchProperty
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeTile.h b/src/osgPlugins/ive/VolumeTile.h
index ba9669fc8..1b722b928 100644
--- a/src/osgPlugins/ive/VolumeTile.h
+++ b/src/osgPlugins/ive/VolumeTile.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class VolumeTile : public osgVolume::VolumeTile, public ReadWrite
+class VolumeTile : public osgVolume::VolumeTile
 {
 public:
 	void write(DataOutputStream* out);
diff --git a/src/osgPlugins/ive/VolumeTransferFunctionProperty.h b/src/osgPlugins/ive/VolumeTransferFunctionProperty.h
index b17333307..50f1a2cce 100644
--- a/src/osgPlugins/ive/VolumeTransferFunctionProperty.h
+++ b/src/osgPlugins/ive/VolumeTransferFunctionProperty.h
@@ -21,7 +21,7 @@
 namespace ive
 {
 
-class VolumeTransferFunctionProperty : public osgVolume::TransferFunctionProperty, public ReadWrite
+class VolumeTransferFunctionProperty : public osgVolume::TransferFunctionProperty
 {
 public:
 	void write(DataOutputStream* out);