Conn/Matlab keeps crashing

Hello all,

I have a large dataset (n=229) and while conn is loading the .dmat files, it crashes around participant 200. I've tried multiple things, restarting the project from scratch, deleting the higher .dmat files, etc. The project is stuck at the first level analysis and if I delete all the .dmat files, redo the first level analysis again, it crashes again, and won't load. Help! 
Thanks!