Hi, everyone after reading the guide from website, i successfully compiled the example PJSUA,and run it I can get the command line ,but when i typed the following command ,it show me an error: Assertion Failed: cached_auth->realm.slen != 0, file c:\pjsip\src\pjsip\sip_auth_client.c, line 341 my command is: +a sip:9001@172.16.16.1 <-id sip:172.16.16.1 <-regristrar * <-realm 9001 <-username 1 <-password It should be easy for your ex