CAD tip # 5102:

Question

CAD

% platform category

Drawing file is not valid (error).

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 Windows 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.

DWG files may become corrupted as a result of virus attack, online transmission errors, disk/media errors, using unreliable AutoCAD clones, or by inadverent editing of their binary content e.g. in Word or Notepad.

ACADACLT

*CAD

8.7.2006 135943× FAQ

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this tip shared by ARKANCE experts applies to: ACAD · ACLT ·

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: How to prevent layer switching in a .DWF file?

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