Make sure they EXPORTED to Autocad, not just SaveAs'ed.
"John7" wrote in message news:5988819@discussion.autodesk.com...
We have some files that have clearly been created with Civil 3D and have
been "save-as" to 2004.
I have access to Civil 3D 2008 but many of us are still supporting AutoCAD
2005/2006 users.
When they open the files they get hundreds of "ARX ERROR: eDuplicateKey" and
"eNotThatKindOfClass" errors. The drawings are impossible to work
productively in.
How do you get rid of this error?
Thanks
John7