[Kamailio-Users] [OpenSER-Users] reply route failure

[Henning Westerholt]

On Thursday 24 July 2008, Fero Vlkolinsky wrote:
> I am getting the folowing error on communication with one of our
> application servers:
>
> tm:t_should_relay_response: pick_branch failed (lowest==-1) for code 404
>
> This is in situation where I have two triggerings to the AS (orig and term)
> and term subscriber is not registered to OpenSER. OpenSER thus returns 404
> not found which is then sent back to OpenSER to be forwarded to orig leg of
> the AS. I had the very same behavior with other AS in our lab and found out
> that it was because of tag added to To header in AS for the 404 response.
> So i removed the tag and the call worked fine. However with this AS it
> doesn't seem to work.
> Is there a way to hack pick_branch so that I see what are the existing
> branches and why it does not match any? Or is there any easier way to find
> out the reason?

Hi Fero,

you could activate the debugging, then you will get more informations from 
within t_should_relay_response and t_pick_branch. And you could also add off 
course more debugging to the code by yourself.

Cheers,

Henning