I did not receive the "Drawing file is not valid" error when opening the DWG file. i will open file sudden hang & close
Then i try this......
1, Open a blank DWG and run the RECOVER command. Select the problematic file. AutoCAD will attempt to recover the file and open it
2, Open a blank DWG and run the RECOVERALL command. Select the problematic file. AutoCAD will attempt to recover the file and open it
3, Open a blank DWG and run the INSERT command. Select the problematic file and see if it will insert. If it does, then run EXPLODE and select the inserted block. Run AUDIT and PURGE commands, and then use SAVEAS to create a new DWG
4, Look in the same directory where the DWG resides and see if there is a BAK file of the same name. If so, rename the BAK extension to DWG and see if the file can then be opened
5, Look in C:\Windows\Temp for files with an SV$ extension. If any exist with a similar name to the corrupted DWG file, then rename the extension to DWG and see if it can then be opened
6, Try opening the drawing using DWG Trueview. If you can open it there, convert the drawing to an older DWG version and try opening again
7, Go to your backup system and restore the file from a time before it became corrupted
No Use........
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