Tutorial on how to read a crash log?

[Sigyn]

My game keeps crashing but for the life of me I can't figure out what the conflict / issue is.  My last two crashes said there was a concurrent modification but I can't figure out which 2 mods are the problems nor could I decipher enough of the previous error logs to find the cause of those crashes. Is there a tutorial or a guide that could help me decipher the crash log? I'm not a coder so I'm probably overlooking the really obvious part of the log file.  

[DaemonUmbra]

ConcurrentModificationException

Reading crash logs takes knowing the vernacular as well as knowing at least a little bit of what's going on under the hood in that specific case, though a general understanding of programming principles is always a good start.

[Sigyn]

Thank you!  I suspected as much. Time to get off my lazy rear & learn Java then.