diff --git a/src/renderer/components/EditBar.vue b/src/renderer/components/EditBar.vue
index 69780be..a808b45 100644
--- a/src/renderer/components/EditBar.vue
+++ b/src/renderer/components/EditBar.vue
@@ -204,7 +204,7 @@ You should have received a copy of the GNU General Public License along with FG
           console.log('make a check worker: ', path.resolve(__dirname, 'check.js'))
 
           const worker = new Worker(winURL)
-          worker.onError = function(e) {
+          worker.onerror = function(e) {
             worker.terminate() 
             worker.view.max = 0
             worker.view.checkDialogVisible = false
diff --git a/src/renderer/components/RunScan.vue b/src/renderer/components/RunScan.vue
index c1acb6b..cb1c79c 100644
--- a/src/renderer/components/RunScan.vue
+++ b/src/renderer/components/RunScan.vue
@@ -74,6 +74,16 @@
 
           const worker = new Worker(winURL)
           console.log(fileUrl('src/renderer/utils/worker.js'))
+          worker.onerror = function (e) {
+            console.error(e)
+            worker.terminate()
+            worker.scanning = false
+            worker.view.progress = 0
+            worker.view.max = 0
+            worker.view.worker = null
+            clearInterval(this.polling)
+            e.preventDefault()
+          }
 
           worker.scanning = this.scanning
           worker.max = this.max
@@ -121,6 +131,16 @@
 
           const worker = new Worker(winURL)
           console.log(fileUrl('src/renderer/utils/worker.js'))
+          worker.onerror = function (e) {
+            console.error(e)
+            worker.terminate()
+            worker.scanning = false
+            worker.view.progress = 0
+            worker.view.max = 0
+            worker.view.worker = null
+            clearInterval(this.polling)
+            e.preventDefault()
+          }
 
           worker.scanning = this.scanning
           worker.max = this.max
@@ -169,6 +189,16 @@
 
           const worker = new Worker(winURL)
           console.log(fileUrl('src/renderer/utils/worker.js'))
+          worker.onerror = function (e) {
+            console.error(e)
+            worker.terminate()
+            worker.scanning = false
+            worker.view.progress = 0
+            worker.view.max = 0
+            worker.view.worker = null
+            clearInterval(this.polling)
+            e.preventDefault()
+          }
           this.scanning = true
           worker.scanning = this.scanning
           worker.max = this.max
diff --git a/src/renderer/utils/scan.js b/src/renderer/utils/scan.js
index 478e728..dd951e0 100644
--- a/src/renderer/utils/scan.js
+++ b/src/renderer/utils/scan.js
@@ -16,6 +16,8 @@ You should have received a copy of the GNU General Public License along with FG
  * @param {*} callback 
  */
 
+const { Debugger } = require("electron");
+
 async function asyncForEach(array, callback) {
   logger('info', "AsyncForEach Len " + array.length);
   for (let index = 0; index < array.length; index++) {
@@ -46,7 +48,7 @@ async function scanGroundnetFiles(p, features) {
     try {
       logger('info', 'Start Groundnets ' + p);
       var files = traverseDir(p);
-      this.postMessage(['max', files.length]);
+      this.postMessage(['max', files.length*2]);
       logger('info', files);
 
       asyncForEach(files, async f => {
@@ -376,6 +378,7 @@ function store(icao, airlines, value) {
 async function readGroundnet(f, features) {
   var promise = new Promise(function (resolve, reject) {
     try {
+      var thisPostMessage = this.postMessage;
       var filename = path.basename(f).match('^([^.]+)\\.([^.]+)(\\.new)?\\.([^.]+)');
       if (filename == null) {
         resolve("File didn't match");
@@ -470,12 +473,10 @@ async function readGroundnet(f, features) {
                   }
                   if(filename [3] === '.new') {
                     feature['properties']['wipgroundnet'] = nodes && nodes.node ? nodes.node.length : 0;
-                    //debugger;
                     feature['properties']['wipparking'] = parkingnodes && parkingnodes.Parking ? parkingnodes.Parking.length : 0;
   
                   } else {
                     feature['properties']['groundnet'] = nodes && nodes.node ? nodes.node.length : 0;
-                    //debugger;
                     feature['properties']['parking'] = parkingnodes && parkingnodes.Parking ? parkingnodes.Parking.length : 0;  
                   }
                 }
@@ -490,6 +491,7 @@ async function readGroundnet(f, features) {
               // report on the success of the transaction completing, when everything is done
               transaction.oncomplete = function (event) {
                 logger('info', 'Write Transaction complete ' + event);
+                thisPostMessage(['progress', 1]);
                 resolve("Stored " + filename[1]);
               };
 
@@ -512,7 +514,7 @@ async function readGroundnet(f, features) {
               };
             }
             objectStoreRequest.onerror = function (event) {
-              logger('info', "Read Errpr : " + event);
+              logger('info', "Read Error : " + event);
               resolve(event);
             }
           }