Hi
Not sure the error is coming from the geometry file ...
the message is not sufficient to localize the problem...
Few things to test, as usual in such situation
- run in sequential mode to identify if it's linked to parrallel computation and domain decomposition or not
- activate the debugger mode of the steering file (DEBUGGER = 1) to have an idea of the subroutine where the segfault arise
- use the debug config to heve more information about the crash and identify precisely the segfault location
Hope this helps