Debugging shell with check().

[keithsloan52]

I am trying to debug some code that creates a shell.
When I run shell.check() I get the following

Code: Select all

Traceback (most recent call last):
  File "/usr/share/freecad/Mod/GDML/GDMLObjects.py", line 931, in execute
    shell.check()
<class 'ValueError'>: Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
Unorientable shape
No error

But unclear what this is telling me and how to progress.