arrojar entidad In the "error box" does it give you a number, or any other indication of the cause?
Also you said this only happens when doing a build, correct? Not a test run.
In the "buildsetup.ini" try settings [GAMEDEBUG] exitpromptreport=1 & debugreport=1, and maybe the loadreport=1.
I have never used them for a build, but might give some insight when a build crashes

Like I said, I haven't used them yet, so not sure.
My games never have bugs. They just develop random features..
Lots and lots of random features...