I noticed a problem after upgrading from LinuxCNC 2.8 to LinuxCNC 2.9
Gmoccapy would fail to open with the following message:
"Found an error!
The following information may be useful in troubleshooting:
Traceback (most recent call last):
File "/usr/bin/gmoccapy", line 5881 , in
iniFile = sys.argv[2]
IndexError: list index out of range"
Issue is related to "File to load on start" - once file is removed (in my case spindle_warm_up.ngc) - Gmoccapy will load again.
Unable to have "File to load on start" set in current version 3.4.9.