Custom unit crash

[HaradxRim]

I've been searching for a long time now, and I can't figure out why my custom unit keeps crashing when I try to select it in the custom battle army selection. The first thing I thought was that I mixing different data from factions caused it to crash (example: empire swordsman unit card for custom unit in chaos roster). So next I tried replacing the data from other factions with data native to the chaos faction (example: marauders), again no results crashes when I select it for battle. I have no clue what I'm doing wrong.

If somebody could help me out, thanks

[Cataph]

When does the crash happen? If it's when you're hovering over its card before launching the battle, something's probably wrong with short description references (typically anyway).
If it's during the loading itself, it could be wrong animation or entity reference or something like that.

[HaradxRim]

Thanks a lot Cataph ! The short description is probably the last thing I expected it to be. Since I'm working on my first unit mod I had no idea where to look, you really helped me out there. I did a aesthetic mod series ("no flaming weapons"), which was mainly changing unit tables and retexturing, and I now want to take it a step further to custom units.
Again thanks a lot now I can start modding units properly.