> I just purchased ACAD 12&13 and want to convert version 10C3 dwg 
 > files to the 13C4 or 12C3 for updating. Attempts to import these files
 > failed. Does anyone have any suggestions. Thanks.
 
  This means you never had R10 with which to make a DXF? If not you might try 
to find someone who has R10 and use that for a DXFOUT. I've only got R12 or I 
would help you out...
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