Is there a particular reason why in the 'load_credentials' parameter to the 'auth_db' module, one can only store values in AVPs, not script variables? e.g. this works: modparam("auth_db", "load_credentials", "$avp(s:var1)=column") But not this: modparam("auth_db", "load_credentials", "$var(var1)=column"); it results in an error like this: Aug 28 19:00:54 diminuendo-1 /usr/local/sbin/kamailio[19651]: ERROR: auth_db [aaa_avps.h:113]: malformed or non AVP $var(auth_user_id) AVP definition Aug 28 19:00:54 diminuendo-1 /usr/local/sbin/kamailio[19651]: ERROR: auth_db [aaa_avps.h:179]: parse failed in "$var(auth_user_id)" at pos 0($var(auth_user_id)) Aug 28 19:00:54 diminuendo-1 /usr/local/sbin/kamailio[19651]: ERROR: auth_db [authdb_mod.c:208]: failed to parse credentials Aug 28 19:00:54 diminuendo-1 /usr/local/sbin/kamailio[19651]: ERROR: <core> [sr_module.c:874]: init_mod(): Error while initializing module auth_db -- Alex Balashov - Principal Evariste Systems LLC 1170 Peachtree Street 12th Floor, Suite 1200 Atlanta, GA 30309 Tel: +1-678-954-0670 Fax: +1-404-961-1892 Web: http://www.evaristesys.com/