From a broad perspective, the ‘Drawing File is Not Valid’ error is caused by the following factors: Alternatively, it might point to an issue with how the file was stored – what Autodesk calls environmental factors. The error message indicates that the drawing file is corrupted or damaged and cannot be used. This can be especially true if you had previously opened the drawing. The ‘Drawing File is Not Valid’ error message in AutoCAD can be disorienting. Understanding the ‘Drawing File is Not Valid’ Error Message Recover the File Using the DRAWINGRECOVERY Command Insert the Affected Drawing into the Current Drawing

Confirm that You are Working with a DWG or DXF File

Repair the Drawing Using the RECOVER Command