What error message are you getting? It would be helpful if you could post the complete output of your program when it's run. Before you do this, uncomment all the calls to app_perror() and use this function (this is in the sources, in pjsip-apps/src/samples/util.h): /* Util to display the error message for the specified error code */ static int app_perror( const char *sender, const char *title, pj_status_t status) { char errmsg[PJ_ERR_MSG_SIZE]; pj_strerror(status, errmsg, sizeof(errmsg)); PJ_LOG(3,(sender, "%s: %s [code=%d]", title, errmsg, status)); return 1; } This displays very useful error messages. John G