Inability to open DWG files and to save a file as a DWG.
The message ‘invalid seed file’ appears before MS crashes and no DWG file is created.
Check the following:
Look in the Save As DWG options dialog box, and check what is listed as the DWG Seed file.
Ensure that this file is listed in the:
"Unable to locate and open seed file required to open this file."