With respect to *_route blocks in kamailio configs, I gather that event_route is the newest type of route in the config vocabulary.  However, many modules have functions that specifically state that they work within certain routes, like REQUEST_ROUTE and FAILURE_ROUTE, with the implication that they won't work in other routes.  For example, there are some functions that "work" in EVENT_ROUTE as well, and that this could be a matter of either documentation not being updated yet, or funny/bad behavior I may encounter at some future point in time...

Generally speaking, are there any general statements that can be made about what "common" modules/functions are definitely only available within request_route and onreply_routes?  event_route blocks, in particular, elucidate many other use cases for several modules' functions that I'm sure the original authors didn't think of, and it would be great to have a high-level commentary/discussion like "module XYZ or modules that touch A, B, and C don't have a snowball's chance of working in an event_route".

Comments are welcome.  Thanks!

Armen