Hi,

To my knowledge the slash is an invalid character.
http://docs.autodesk.com/ACD/2010/ENU/AutoCAD%202010%20User%20Documentation/index.html?url=WS1a9193826455f5ffa23ce210c4a30acaf-7345.htm,topicNumber=d0e41665
https://help.autodesk.com/view/ACD/2015/ENU/?guid=GUID-CE211679-F264-4128-BE00-BF4E0E7DEA8E

These lists are regarded as incomplete there a comma isn't a valid character either.

One can not create layer names with these invalid characters under QCAD.
Here you see that QCAD adds a layer dialog input validator:
https://github.com/qcad/qcad/blob/master/scripts/Layer/LayerDialog.js#L72

The same restrictions are applicable on Block names.

Regards,
CVH

i see but maybe its an good idea not only to throw an invalid symbol and you cant change it. the application will crash or you need to kill them hard.

best way should be an invalid character and an information that you should change that. if the message comes up you cant do anything.

maybe this should be improved.

So, it is thus not a QCAD bug, it is a bug in your drawing document.
QCAD follows the dxf standard strictly.

One can update that in the source application.

Perhaps you could file a feature request or give a suggestion.

Regards,
CVH

Yes i can do that.

Maybe its an good idea to catch the error message and throw an information to change the layer name? what do you think?

It should not be possible to enter such a name for a layer. The layer name check fails in the layer dialog on the macOS M1/M2/M3 platform.

Hi Andrew,

ok. so do you think its a bug? By the way i use the commercial version and i like this software. :)

thanks Sven

The problem is that the layer dialog lets you enter characters that are not allowed by the DXF/DWG format (/ in this case). This will be fixed for the next release.