[SR-Users] Access to CANCEL messages sent during parallel forking

Hi All, I have a question regarding call forking and how to access failed branches: the ones for which kamailio sends out the CANCEL because on another one a 200OK was received. This is the scenario:  - A calls B  - 3 devices are registered on B, so a parallel forking is done to B1, B2 and B3  - B1, B2, and B3 all reply with 180 Ringing  - B1 replies with 200OK  - Kamailio CANCELs the branches with B2 and B3 What I need is access to each single CANCEL that Kamailio sends out to B2 and B3. In particular I need to know the branch-id and Via branch of all the cancelled branches. Additionally it would be perfect to have them inside the TM module, in order to have access also to internal AVPs. I tried with dedicated failure routes and also with per-branch failure routes, but I was never able to access to those values. I also didn't found a specific event-route that can help me solve this problem. Does anyone have an idea? Kamailio version 5.2.5 Thanks Regards Marco