diff --git a/io_scene_a3d/A3DBlenderExporter.py b/io_scene_a3d/A3DBlenderExporter.py
index 0f3f922..7e5d875 100644
--- a/io_scene_a3d/A3DBlenderExporter.py
+++ b/io_scene_a3d/A3DBlenderExporter.py
@@ -79,11 +79,11 @@ class A3DBlenderExporter:
         transformParentIDs = []
         for ob in self.objects:
             parentOB = ob.parent
-            if (parentOB == None) or (ob.name not in transforms):
+            if (parentOB == None) or (parentOB.name not in transforms):
                 transformParentIDs.append(0) #XXX: this is only for version 2
             else:
-                parentIndex = list(transforms.keys()).index(ob.name)
-                transformParentIDs.append(parentIndex)
+                parentIndex = list(transforms.keys()).index(parentOB.name)
+                transformParentIDs.append(parentIndex+1)
 
         self.modelData.materials = materials.values()
         self.modelData.meshes = meshes
diff --git a/io_scene_a3d/A3DBlenderImporter.py b/io_scene_a3d/A3DBlenderImporter.py
index c0be3c2..7635340 100644
--- a/io_scene_a3d/A3DBlenderImporter.py
+++ b/io_scene_a3d/A3DBlenderImporter.py
@@ -71,11 +71,11 @@ class A3DBlenderImporter:
         for obI, ob in enumerate(objects):
             # Assign parents
             parentID = self.modelData.transformParentIDs[obI]
-            if parentID == 0 and self.modelData.version < 3:
+            if self.modelData.version < 3:
                 # version 2 models use 0 to signify empty parent
-                continue
-            elif parentID == -1:
-                # version 3 models use -1 to signify empty parent
+                parentID -= 1
+            if parentID == -1:
+                # empty parent
                 continue
             parentOB = objects[parentID]
             ob.parent = parentOB