Anyway, it seems this thread only discusses 2007. I am having same problem when opening with AutoCAD 2006 and saveas 2000. When open with 2000 copybase/copyclip/wblock(selecting objects) fail. The AutoCAD command line reports "Error writing/closing file".

Since 2006 does not have acdb17.dll, which is what the hotfix is (replacing acdb17.dll) I am stuck.

Any help, please?