Game crashing on crew management...

[Jeti]

Hi to all,

I have a pretty weird problem with the game: the game crashes (XP back to desktop) after using the crew-management screen in the direct vicinity of a convoy.
I know it sounds crazy, but I had this in two different missions (career-mode). What happens is that I'm sneaking up on a convoy (90m deep, silent running), dodging the Destroyers and then I get the warning 'not enough crew in electrical engines compartiment' when I want to change speed. I then switch to the crew/damage control screen and when I try to replace/reorder the crew in the electrical engine department the game crashes to desktop.
I can restart the game immediately, continue my career but loading the latest save only brings me back to the vicinity of the convoy with the same crew-fatique sit again.
I do have some mods installed (like the 'das boot' crew and some graphical stuff) but still play the game 'standard' with the latest patch.
Does any on you have a lead for me before I start reinstalling the game?

Thx,

Jeti