Hi, Is there a way or workaround to generate AVPs with header values as AVP name? It seems to me that the current AVP concept defines the AVPs at OpenSER startup, so header-value-based names are not feasible. What I need is the following: Store/retrieve a (key,value) pair where the key is the current message's call-id and the value some combination of header values and pseudo- variables. e.g. use the ops avp_printf("$hdr(call-id)", "$hdr(call-id)-$Ts"); avp_pushto("$Myheader","$hdr(call-id)"); in order to append the following header to the SIP message: Myheader: 23459(a)10.0.0.1-4235627623 Any idea how to do this in OpenSER? thanks in advance --Joachim