Edited Rookie/Soph teams, now game crashes

If I choose to go to rookie challenge, the game crashes while it's loading up. Any idea what's wrong, are there any obvious pitfalls I may have fallen into when editing the teams?

Which file did you edit players.dbf and appearance.dbf ?

If you have added players manually just look if they have the same Id number in the two dbf files

Yeah those two; I double checked the id numbers....

Missing or duplicate ROSTERPOS values could be another.

Rosterpos and playerid's all look fine...

I wonder if it's just an individual player that's corrupt?

Perhaps...might be worth checking again just to be sure.