Post Processing failure

[Fborato]

Hi,
I'm having problems post processing. When I do it just after open the program it works well, but at the second time apear the failure above and don't save the Gcode. When it happen i must close Freecad, open it again and then it works post processing only once.
Somebody know how can I solve it? Thanks in advance.

Running the Python command 'Path_Post' failed:
Traceback (most recent call last):
File "C:\Program Files\FreeCAD 0.19\Mod\Path\PathScripts\PathPost.py", line 396, in Activated
(fail, rc, filename) = self.exportObjectsWith(finalpostlist, job)
File "C:\Program Files\FreeCAD 0.19\Mod\Path\PathScripts\PathPost.py", line 211, in exportObjectsWith
gcode = processor.export(objs, filename, postArgs)
File "C:\Program Files\FreeCAD 0.19\Mod\Path\PathScripts\PathPostProcessor.py", line 100, in export
return self.script.export(obj, filename, args)
File "C:/Program Files/FreeCAD 0.19/Mod/Path/PathScripts/post\linuxcnc_post.py", line 197, in export
job = PathUtils.findParentJob(obj)
File "C:\Program Files\FreeCAD 0.19\Mod\Path\PathScripts\PathUtils.py", line 444, in findParentJob
if hasattr(i, 'Proxy') and isinstance(i.Proxy, PathJob.ObjectJob):

Cannot access attribute 'Proxy' of deleted object


OS: Windows 10 Version 2004
Word size of OS: 64-bit
Word size of FreeCAD: 64-bit
Version: 0.19.24291 (Git)
Build type: Release
Branch: releases/FreeCAD-0-19
Hash: 7b5e18a0759de778b74d3a5c17eba9cb815035ac
Python version: 3.8.6+
Qt version: 5.15.2
Coin version: 4.0.1
OCC version: 7.5.0
Locale: Portuguese/Brazil (pt_BR)

[chrisb]

You should retry with the latest 0.20. If the problem persists, you may upload the file, but you should definitely tell, which postprocessor you use.

[bmsaus4ax]

Hi,
I'm having problems post processing. When I do it just after open the program it works well, but at the second time apear the failure above and don't save the Gcode. When it happen i must close Freecad, open it again and then it works post processing only once.
Somebody know how can I solve it? Thanks in advance.

Have a look at the thread at "https://forum.freecadweb.org/viewtopic. ... ff#p490458 "
Read back through the thread also to get the context, but this seems to be what you are experiencing.

OS: Ubuntu 20.04.2 LTS (ubuntu:GNOME/ubuntu)
Word size of FreeCAD: 64-bit
Version: 0.20.25131 (Git) AppImage
Build type: Release
Branch: master
Hash: 7c519689f0d5ea78fb3292be36a857d283c05507
Python version: 3.9.5
Qt version: 5.12.9
Coin version: 4.0.0
OCC version: 7.5.2
Locale: English/Australia (en_AU)

[GeneFC]

This looks a lot like the error that sometimes occurs when changes are made to the model after the Job is created.

The message

Cannot access attribute 'Proxy' of deleted object

is the sort of thing that shows up after delete, undo, reordering, etc. I recall there is some issue between C++ and Python in which the synchronization of deletions is not quite complete.

If the post processing works correctly the first time then it is not likely a problem with the post processor (appears to be linuxcnc in this case).

I do not know a solution except to try to avoid a lot of changes after the Job is created. Parameter changes are fine, but subtracting and then re-adding operations sometimes leads to this sort of crash. Also I have had this sort of error when re-entering the Job definition task and then cancelling without making any changes.

Gene