Hi, On Nintendo DS I tried to use following options : - use-ice - stun-srv But they didn't work. So I began with stun-srv. When I run my software (SvSIP), it quits on error. So there isn't log file, and without debugger I can't solve the problem. I deactivate exception handler, and when I run software, it never calls "pj_stun_detect_nat_type" (I see that because I run the same code on windows) Do you have an idea ? I suspect a buffer overflow Best regards Samuel