diff --git a/simgear/debug/ErrorReportingCallback.cxx b/simgear/debug/ErrorReportingCallback.cxx
index 2cea927f..d735a149 100644
--- a/simgear/debug/ErrorReportingCallback.cxx
+++ b/simgear/debug/ErrorReportingCallback.cxx
@@ -87,6 +87,11 @@ ErrorReportContext::ErrorReportContext(const std::string& key, const std::string
 }
 
 ErrorReportContext::ErrorReportContext(const ContextMap& context)
+{
+    addFromMap(context);
+}
+
+void ErrorReportContext::addFromMap(const ContextMap& context)
 {
     if (static_contextCallback) {
         for (const auto& p : context) {
@@ -96,6 +101,7 @@ ErrorReportContext::ErrorReportContext(const ContextMap& context)
     }
 }
 
+
 ErrorReportContext::~ErrorReportContext()
 {
     if (static_contextCallback) {
diff --git a/simgear/debug/ErrorReportingCallback.hxx b/simgear/debug/ErrorReportingCallback.hxx
index 6866029e..c4885ff3 100644
--- a/simgear/debug/ErrorReportingCallback.hxx
+++ b/simgear/debug/ErrorReportingCallback.hxx
@@ -78,7 +78,12 @@ public:
     /**
     Allow establishing multiple context values in a single operation
      */
-    ErrorReportContext(const ContextMap& context);
+    ErrorReportContext(const ContextMap& context = {});
+
+    /**
+     @brief allowed delayed add of values
+     */
+    void addFromMap(const ContextMap& context);
 
     ~ErrorReportContext();
 
diff --git a/simgear/scene/model/modellib.cxx b/simgear/scene/model/modellib.cxx
index ad0e07b9..9511f83c 100644
--- a/simgear/scene/model/modellib.cxx
+++ b/simgear/scene/model/modellib.cxx
@@ -143,7 +143,10 @@ SGModelLib::loadModel(const string &path,
 
     // establish the error report context so we can attribute any load
     // errors correctly
-    simgear::ErrorReportContext ec(data->getErrorContext());
+    simgear::ErrorReportContext ec;
+    if (data) {
+        ec.addFromMap(data->getErrorContext());
+    }
 
     if (load2DPanels) {
        opt->setLoadPanel(static_panelFunc);
@@ -164,9 +167,10 @@ SGModelLib::loadDeferredModel(const string &path, SGPropertyNode *prop_root,
     proxyNode->setLoadingExternalReferenceMode(osg::ProxyNode::DEFER_LOADING_TO_DATABASE_PAGER);
     proxyNode->setFileName(0, path);
 
-    // establish the error report context so we can attribute any load
-    // errors correctly
-    simgear::ErrorReportContext ec(data->getErrorContext());
+    simgear::ErrorReportContext ec;
+    if (data) {
+        ec.addFromMap(data->getErrorContext());
+    }
 
     osg::ref_ptr<SGReaderWriterOptions> opt;
     opt = SGReaderWriterOptions::copyOrCreate(osgDB::Registry::instance()->getOptions());
@@ -199,9 +203,10 @@ SGModelLib::loadPagedModel(SGPropertyNode *prop_root, SGModelData *data, SGModel
     unsigned int simple_models = 0;
     osg::PagedLOD *plod = new osg::PagedLOD;
 
-    // establish the error report context so we can attribute any load
-    // errors correctly
-    simgear::ErrorReportContext ec(data->getErrorContext());
+    simgear::ErrorReportContext ec;
+    if (data) {
+        ec.addFromMap(data->getErrorContext());
+    }
 
     osg::ref_ptr<SGReaderWriterOptions> opt;
     opt = SGReaderWriterOptions::copyOrCreate(osgDB::Registry::instance()->getOptions());