Hi, It seems that the pjsip_parse_uri fails to parse an URI if it contains 'unknown' parameters. Here is an example of valid SIP URI not parsable (from OMA-TS-PoC-ControlPlane-V1_0_1-20061128-A): <sip:PoC-ClientA at networkA.net>; +g.poc.talkburst;+g.poc.groupad It seems that (pj_scan_is_eof(&scanner) || IS_NEWLINE(*scanner.curptr)) returns false. Kind regards, javier