I'm currently setting up two kamailio sip proxy server, and was working with 3.0.3 and still in testing phase. Because I saw kamailio 3.1.0 was released, I tried to upgrade to 3.1.0 yesterday. But when running with my current config, I got a segfault. I've analysed the core with gdb. In modules_k/nat_traversal/nat_traversal.c LINE 1731 it tries to cal slb.register_cb. The slb variable is correct, but the method register_cb is pointing to 0 in stead of a correct memory address. When looking at modules/sl/sl.c, line 360-364 I see all methods of the struct are mapped to their corresponding functions, but not the register_cb. because that part of the code is changes between 3.0.x and 3.1.0 I assume that some part of sl.c is missing, because the definition of the struct in sl.h does contain the register_cb method. Can someone have a look at this? Thnx! Robert Verspuy -- *Exa-Omicron* Patroonsweg 10 3892 DB Zeewolde Tel.: 088-OMICRON (66 427 66) http://www.exa-omicron.nl