Hi, I have the same issue with mcomix = 3.1.0-1
Issue look like appear after python3 upgrade 3.13.3-1 -> 3.13.5-1. Matohara San's pach (thanks !!!) works also for me. Edit your /usr/lib/python3/dist-packages/mcomix/__main__.py and change: mp.set_start_method('spawn') to: try: mp.set_start_method('spawn') except RuntimeError: pass Be careful for tabs, because Python is tab sensitive. Best regards, Olivier