Some people are experiencing a crash to desktop seemingly when pawns attempt to use training weapons. The crash makes it hard to research\identify the source. I have experienced this behavior on several playthroughs and have also spent time trying to find the source, in a test colony with Combat Training mod alone I was unable to reproduce the behavior, I then slowly added my common mods to see if it was some unexpected conflict\interaction and was unable to reproduce the issue.
For the playthroughs where I was getting this behavior removing the training weapons from my colony seemed to address the behavior. I attempted to mitigate damaging the Dummys by giving my training pawns low damage weapons (ie pain gun\stick, anesthetic gun, etc) but that was a bit more micromanaging than I wanted to do.
This mod patches the CombatDummy to not take damage from regular weapons so pawns can train with their normally equipped weapons without constantly requiring repairs. Credit to jastro, used his "lite" mod to get the ThingDef patch values.
If you love the Combat Training mod but unfortunately have this behavior using the training weapons you can try this workaround. Given the inconsistent ability to reproduce the crash, I have only been able to do basic testing.
