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CAD tip CAD tip # 12347:

Question CAD 
 %  platform  category 
Q - question

Invalid or incomplete DXF input -- drawing discarded.

A - answer When trying to open a DXF file in AutoCAD, an error is reported:

Error in drawing header on line 1.
Invalid or incomplete DXF input -- drawing discarded.
Press ENTER to continue:

This error indicates that the opened DXF file is corrupted (damaged). Common causes are:

  • The DXF file was created by an external application but it doesn't have a proper format matching the DXF specification.
  • The file was created as an export from a corrupted (e.g. non-Autodesk) DWG file.
  • The file was damaged during transmission or during copying.
  • It is not a DXF file, but e.g. a renamed .DWG file.
  • The DXF file was edited in Word.
  • The DXF file is not stored in the ASCII or UTF-8 (w/o BOM) format - it is stored e.g. in the text format encoded as UTF-16 or as UTF-8 with the leading BOM characters.

Try to create the DXF file again or repair it using a text editor, e.g. Notepad, Notepad++.

A typical DXF file (after you open it in Notepad) begins e.g. with this:

  0
SECTION
  2
HEADER
  9
$ACADVER
  1
AC1032
  9
$ACADMAINTVER
 90
      157
  9
$DWGCODEPAGE
  3
ANSI_1250
  9
$LASTSAVEDBY
...

The error may be found also on a higher line number - in this case, it is typically a syntax error in the DXF exchange format on the given row. Or the file comes from a higher AutoCAD version than you use to open it. Correct the problem in a text editoru or contact your AutoCAD vendor.

ACADLTACADM
100% *  CAD 
21.8.2019    486×   FAQ  
applies to: AutoCAD · AutoCAD LT · AutoCAD Mechanical ·

See also:
Tip 12069:Unicode and DXF files.
Tip 11972:How to convert a Tinkercad 3D model to a DWG file?
Tip 11720:How to export unfolded sheetmetal parts in Fusion 360?
Tip 11337:Convert 3D PDF files back to CAD models.
Tip 10903:How to import an Illustrator file (.AI) into AutoCAD (.DWG)?


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