could well be a corrupt jam, move all the monaco jams out of the jam folder, if track doesn't crash
then start putting the jams back until you discover the offending jam or jams.
after finding the culprit first thing is to resize the jam (depending on size) to 256/512 or 768, if that
doesn't work then you need to create a new version of the jam.
if track crashes without the jams then it's an error, could be fence on and off commands overlapping
or host of other things causing the crash. tracks can also crash due to carshapes or errant spaces
in gpxpatch .set files. so its worth checking the track with no mods installed.
pk