Well, Almost. I can open previously created maps but when trying to add dxf files (including ones previously added)i get a Could Not Add error with following reason: AddedMap.openMapFile: AddedMap.ClipBasicRevised2: AddedMap.MapGenProcess: ZValues.Assign: Cannot assign a nil to a TValueList As I said this happens when trying to add dxf files to a new map that had previously worked in Map Editor 10. Any thoughts? Thanks