EDIT: Man, I'm just plain stupid - worked on it some more until I was able to get the tank actually empty - that did the trick. Thanks again.
Thank you for responding typer4171. I think there might be something wrong with my arma2 installation or something. Here is what I tried:
1. placed a unit as player on the map, then added 3 crewmen. then placed a tank near them on the map
2. did the same, but added grouping lines
3. the same as above, but put the player and crew on top of the tank
Each scenario resulted in the same "invalid crew" message after arma2 crashed.
Thanks again, but I may be out of luck.
This post was edited by pz (2009-08-09 22:03, ago)