DXF: OGR-created files containing a "Defpoints" layer can't be opened in AutoCAD

[Alan Thomas]

Upon running the following command, where in.dxf contains objects on the "Defpoints" layer:

ogr2ogr -f "DXF" -overwrite out.dxf in.dxf

out.dxf can't be opened in AutoCAD. The following error is issued by AutoCAD:

Error in LAYER Table
Invalid AcDbLayerTableRecord plot flag for DEFPOINTS layer on line 1252.
Invalid or incomplete DXF input -- drawing discarded.

This can be resolved by adding

290
     0

in the LAYER table entry for the "Defpoints" layer.

"Defpoints" is a special AutoCAD layer that is never supposed to be displayed, so AutoCAD seems to insist that a layer with this name shouldn't be plotted.

Probably a minor issue as it may well only happen when round-tripping DXF files, which is an unusual use case.

[Even Rouault]

In 40365:

DXF: on write side, force 'defpoints' layer to be non-displayed (fixes #7078)

[Even Rouault]

I've not Autocad to test, so I'd appreciate if you could confirm that it fixes the issue