Help with mod debugging

Hi, I am making a personal mod using FQM as a base, and a few features from balance mod.
While playtesting, I noticed that attempting to place a sphere world causes a CTD, now the thing with this is that I haven't even touched any files relating to sphere worlds, the files should be stock FQM files.

Does anyone know if sphere worlds even work in the latest version of FQM or balance mod? If they do, how do I go about finding out why my game is crashing? I have tried using the debugsettings.txt but it did nothing.
I'm hoping someone can show me a way of outputting a log file of what was loaded ect so I can see what has happened.

Really hope someone can help me with this.

Btw, I did of course try copying the relevant sections from the stock Stellarobjectstypes.txt into my Stellarobjectstypes.txt but it made no difference at all.

Cheers, Dan.