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CAD tip CAD tip # 5102:

   
Question CAD 
 %  platform  category 
Q - question

Drawing file is not valid (error).
A - answer The error message "Drawing file is not valid" when opening a DWG file informs about a corrupted drawing file or a DWG format of a newer AutoCAD version.

Try to open the .DWG file in Notepad and check if the file starts with AC10xx (see Tip 868). You may try to use the RECOVER command on the file, or INSERT it into an empty drawing.

ACADLT
100% *  CAD 
8.7.2006    133451×  
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applies to: AutoCAD · AutoCAD LT ·

See also:
Tip 12347:Invalid or incomplete DXF input -- drawing discarded.
Tip 4505:Backward compatibility of the AutoCAD DWG formats.
Tip 868:How to find drawings coming from a given version of AutoCAD?
Selected tip: My AutoCAD DesignCenter (or other) window is lost (off-screen).


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