Muelli, did you literally call it with "%I"? In a unit that gets replaced with the unescaped instance name, i. e. something like "3-1.2:1.0". I. e. did you get this backtrace from the journal or so, or did you call usb_modeswitch_dispatcher on the command line? In that case it needs a proper argument, not literally "%I". Thanks for investigating!
Muelli, did you literally call it with "%I"? In a unit that gets replaced with the unescaped instance name, i. e. something like "3-1.2:1.0". I. e. did you get this backtrace from the journal or so, or did you call usb_modeswitch_ dispatcher on the command line? In that case it needs a proper argument, not literally "%I". Thanks for investigating!