C++ & protocol buffer bug fix [i indentificated the issue, but dont know how to fix..]

Hey, im working on a c++ gameserver and i reworked all my files to protocol buffer All my systems worked fine. Now i just get an crash, i was able to identificate it but i dont know how to solve. Im looking for someone which have the needed tasks in c++ and well known in protocol buffers to solve it. Aswell i have an old copy with reference to take a look over if need. Im glad if anyone can help me.