Johann,
gdb cjson
(gdb) run enetering ... json->addNumber (json, [number], 123) Program received signal SIGFPE, Arithmetic exception. 0x00007fffffffdcfb in ___ () (gdb) disass No function contains program counter for selected frame. (gdb)=20 I've tried running gdb to step through the core dump, but this is alluding me. Mike, PS .. I ran this same code through Android's cppDroid, and it ran fine.