Hi All, I have the known error displayed when I call pjsua_call_make_call : "Calling pjlib from unknown/external thread..." . When I search on old messages from PJSip list about this problem, I can find that I have to do the following thing : if(!pj_thread_is_registered()) { pj_thread_register(NULL,desc,&thread); } So, I register thread on my function that initialize PJSip. All works ok, but when I call pjsua_call_make_call I have the error. This error appears with version 1.0.3. Previously, I used version 1.0.0 and all worked fine. Can anyone can help me? Thanks and best regards, Greg