Hi, using kamailio 1.5 rev 5868 (2009-06-02) I'm experimenting a strange issue: - Kamailio relays (t_relay) an INVITE to a gateway. - The gateway replies 400 due to local access policy (don't ask me why it decides to use 400 code). - Kamailio sends the ACK and routes back the 400 upstream correctly, but it shows a warning "transaction not released" (or a similar text). It makes no sense as there is not especial handling for 400 responses, and the warning doesn't occur when receiving any other final non 2XX code. However I've haven't tested with new versions, I just would like to know if it's a known issue. Thanks. -- Iñaki Baz Castillo <ibc(a)aliax.net>