Hello ardorious,

your game crashed in Romes turn, as you said. The only thing that worked was to get all regions held by Rome with FD and gifting them back again. This is the save one turn after yours: http://ul.to/1nz1lx
Possible reason is the Vanilla Marian Reform, but I'm not sure about that...

The Rebels behave also very strangely in your campaign, did you gave them money by script or else?

XSamatan