RB DJ Crashing

When playing a track I go to load another track on RBDJ and the system stops and crashes. There is no parent logic to this as have checked and reanalysed the files. Also it is choosing to crash on some track used the previous night (as in they have cue points etc) and were fine. I have as a result not used RBDJ through Dec due to high work volume and using RB as usb functions. I am somewhat nervous of using RBDJ in a gig at the moment till this is resolved.