I’ve a problem of this type:

On the first INVITE is all ok, insert record route with cookie of the dialog:

Record-Route: <sip:x.x.x.x;lr=on;ftag=as0f04b1b4;didsw=007.1661>

The I recieive a 422 for the session timer too small .

I resend the new invite with correct expire but with a new cookie dialog value

Record-Route: <sip:x.x.x.x;lr=on;ftag=as0f04b1b4;didsw=007.2661>

Then the call is connected (Record-Route: <sip:x.x.x.x;lr=on;ftag=as0f04b1b4;didsw=007.2661>).

The there is a reInvite for the session timer , the script enter in the routine WITHINDLG . At this point the dialog seems to be lost.

The accounting is made with dialog variable and in the 2 records INVITE and BYE , the fields corresponding to these values are missing.

In all the other calls without the reInvite for session timers, the dialog is found and the variables are present.

I don’t understood what is problem ? Thanks for the help