diff --git a/Common_glTF_Exporter/Core/GlTFExportContext.cs b/Common_glTF_Exporter/Core/GlTFExportContext.cs
index 0d9ba19..0958c59 100644
--- a/Common_glTF_Exporter/Core/GlTFExportContext.cs
+++ b/Common_glTF_Exporter/Core/GlTFExportContext.cs
@@ -316,7 +316,7 @@ public void OnPolymesh(PolymeshTopology polymesh)
 
             if (preferences.normals)
             {
-                GLTFExportUtils.AddNormals(preferences, CurrentTransform, polymesh, currentGeometry.CurrentItem.Normals);
+                GLTFExportUtils.AddNormals(CurrentTransform, polymesh, currentGeometry.CurrentItem.Normals);
             }
         }
 
@@ -331,6 +331,8 @@ public void OnPolymesh(PolymeshTopology polymesh)
         /// <param name="elementId">Element Id.</param>
         public void OnElementEnd(ElementId elementId)
         {
+            element = doc.GetElement(elementId);
+
             if (currentVertices == null || !currentVertices.List.Any())
             {
                 return;
@@ -343,7 +345,7 @@ public void OnElementEnd(ElementId elementId)
                 return;
             }
 
-            if (!Util.CanBeLockOrHidden(element, view, isRFA))
+            if (!Util.CanBeLockOrHidden(element, view, isRFA) || element is RevitLinkInstance)
             {
                 return;
             }
diff --git a/Common_glTF_Exporter/Export/MeshOpt.cs b/Common_glTF_Exporter/Export/MeshOpt.cs
index e4df45a..475f4d1 100644
--- a/Common_glTF_Exporter/Export/MeshOpt.cs
+++ b/Common_glTF_Exporter/Export/MeshOpt.cs
@@ -3,6 +3,8 @@
 using System.IO;
 using System.Reflection;
 using System.Collections.Generic;
+using Autodesk.Revit.DB;
+using System;
 
 namespace Common_glTF_Exporter.Export
 {
@@ -55,10 +57,18 @@ public static void Compress(Preferences preferences)
             Gltf.GltfPack.gltfpack(fileToCompress,
                 fileToCompressTemp, "report.txt", settings);
 
-            #endif
+#endif
 
-            files.ForEach(x => File.Delete(x));
-            File.Move(fileToCompressTemp, fileToCompress);
+            if (File.Exists(fileToCompressTemp))
+            {
+                files.ForEach(x => File.Delete(x));
+                File.Move(fileToCompressTemp, fileToCompress);
+            }
+            else
+            {
+                Console.WriteLine("The Compression didn't work");
+            }
+            
 
             if (preferences.format == FormatEnum.gltf)
             {
diff --git a/Common_glTF_Exporter/Transform/ModelRotation.cs b/Common_glTF_Exporter/Transform/ModelRotation.cs
index b770b05..e69042a 100644
--- a/Common_glTF_Exporter/Transform/ModelRotation.cs
+++ b/Common_glTF_Exporter/Transform/ModelRotation.cs
@@ -14,7 +14,7 @@ public static List<double> Get(bool flipAxis)
             }
             else
             {
-                return new List<double> { 0, 0, 0, 0};
+                return new List<double> { 0, 0, 0, 1};
             }
         }
     }
diff --git a/Common_glTF_Exporter/Utils/glTFExportUtils.cs b/Common_glTF_Exporter/Utils/glTFExportUtils.cs
index 13ea10f..0ea30f9 100644
--- a/Common_glTF_Exporter/Utils/glTFExportUtils.cs
+++ b/Common_glTF_Exporter/Utils/glTFExportUtils.cs
@@ -1,5 +1,6 @@
 namespace Common_glTF_Exporter.Utils
 {
+    using System;
     using System.Collections.Generic;
     using System.Linq;
     using Autodesk.Revit.DB;
@@ -122,7 +123,7 @@ public static GLTFBinaryData AddGeometryMeta(List<GLTFBuffer> buffers, List<GLTF
             return bufferData;
         }
 
-        public static void AddNormals(Preferences preferences, Transform transform, PolymeshTopology polymesh, List<double> normals)
+        public static void AddNormals(Transform transform, PolymeshTopology polymesh, List<double> normals)
         {
             IList<XYZ> polymeshNormals = polymesh.GetNormals();