[Serusers] lookup(): '' Not found in usrloc

A UA is trying to send NOTIFY: U 1.2.3.4:56839 -> 5.6.7.8:5060 NOTIFY sip:machine.foo.com SIP/2.0. Via: SIP/2.0/UDP 1.2.3.4:56839;branch=z9hG4bK-ee80efbb. From: TPA - PSTN <sip:9876@machine.foo.com>;tag=ddf83b1b7d0b3b06o1. To: <sip:machine.foo.com>. Call-ID: e368f273-a2f62b8e(a)192.168.251.10. CSeq: 31511 NOTIFY. Max-Forwards: 70. Event: keep-alive. User-Agent: Sipura/SPA3000-2.0.13(GWg). Content-Length: 0. The reponse is: U 5.6.7.8:5060 -> 1.2.3.4:56839 SIP/2.0 404 User Not Found - lookup_location. Via: SIP/2.0/UDP 1.2.3.4:56839;branch=z9hG4bK-ee80efbb. From: TPA - PSTN <sip:9876@machine.foo.com>;tag=ddf83b1b7d0b3b06o1. To: <sip:machine.foo.com>;tag=efa044f399b3f75e8ec9d81a905f914f.d18f. Call-ID: e368f273-a2f62b8e(a)192.168.251.10. CSeq: 31511 NOTIFY. Server: Sip EXpress router (0.9.7-pre1 (i386/freebsd)). Content-Length: 0. Warning: 392 5.6.7.8:5060 "Noisy feedback tells: pid=15425 req_src_ip=1.2.3.4 req_src_port=56839 in_uri=sip:machine.foo.com out_uri=sip:machine.foo.com via_cnt==1". Feb 25 08:09:13 machine /usr/local/sbin/ser[15425]: lookup(): '' Not found in usrloc Can anyone tell me why the user is not found ? Any help here is greatly appreciated -kim -- w8hdkim(a)gmail.com