Dear Sir, How can i fix it? Code: ===== pj_str_t uri = pj_str(argv[1]); status = pjsua_call_make_call(acc_id, &uri, 0, NULL, NULL, NULL); if (status != PJ_SUCCESS) error_exit("Error making call", status); When i make a call ================== [sun at example mysip]$ ./myapp sip:5000 at ipaddress I get error: ========== --end msg-- 22:49:44.192 pjsua_acc.c Registration sent 22:49:44.192 pjsua_media.c Error retrieving default audio device parameters: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] 22:49:44.192 APP Error making call: Unable to find default audio device (PJMEDIA_EAUD_NODEFDEV) [status=420006] 22:49:44.202 pjsua_core.c Shutting down... 22:49:44.202 pjsua_pres.c Shutting down presence.. 22:49:44.202 pjsua_media.c Shutting down media.. 22:49:44.667 pa_dev.c PortAudio sound library shutting down.. 22:49:44.667 sip_reg.c Unable to send request, regc has another transaction pending 22:49:44.667 pjsua_acc.c Unable to create/send REGISTER: Object is busy (PJSIP_EBUSY) [status=171001] Thank you Regards -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.pjsip.org/pipermail/pjsip_lists.pjsip.org/attachments/20100803/48ea9976/attachment.html>