This is my first post to this list, so please bear with me ... I'm trying to do something like this branch_route[1] { ... add_rr_param(";nat=true"); ... } using the RR module with OpenSER 1.0.1. Loading the config results in openser: parse error (344,32-33): Command cannot be used in the block I thought that should work, since the add_rr_param() documentation includes "This function can be used from REQUEST_ROUTE, BRANCH_ROUTE and FAILURE_ROUTE". Thanks for any help, Christian