FIFA 14 career mode crash reason


Club Supporter
I have 2 questions:
1. there is a way to know why FIFA 14 crash in career mode? e.g. why crash after a FIFA 14 editing (league change, team change, etc)
2. there is a limit on leagues creation? I usually add more leagues, teams, national teams, etc and at some point start crashing career mode.

I love edit FIFA 14 all the time, but I can find the way to know when something provokes a crash. I usually restore the version to the point before my new changes but I want to have a better way to understand what provokes the crash and fix accordingly

Thanks in advance!