I was just reading this thread on the GliderRacing.com forum which suggest some Condor crash problems could be caused by flying offline with ghosts. He suggest deleting LastTrack.ftr before starting Condor. He was specifically talking about these kind of errors though:
I tried to get in over and over, got “refresh gui” and then “floating point division by zero”
Delete LastTrack.ftr, start Condor… Mostly occurs when u trying smthg in offline and ghosts? or?