Sorry, I was trying to solve the problem of why my .trn file wouldn't work when I didn't have Heroes 1_7 installed.
And if it doesn't effect pretenders, when why would my game insist on it being present (and turning it on, when it is present) when I try to play a turn. Unless you had it on when you set the .trn file into motion.
I'll run my turn and see if anything kicks back as being bad from it.