Hmm, tried both still crashed -so I checked vanilla:
It's the path that's scewing it up:
Goto units
click pikemen
click replaced by Landsknecht
works fine.
BUT
Goto Impi
then click icon for upgrades to pikemen
then click replaced by Landsknecht
Crash!
Maybe it's something I did...anybody else get this?
Found the problem: I'm using solvers events in and instead of using it as a module or mod I extracted the files overwriting the original files...eh..troubleshooting...reminds me of why I rather play a mod than build one!