Hello list, currently I am trying to use the enum_pv_query function of the enum module but I always get an error: the R-Uri-User is not an e164-Number. That's true, but not important (and must not result in a failed lookup), because the function should use a pv for the lookup, not the R-Uri-User. In enum.c I discovered in function enum_pv_query_3 : /* * Get R-URI user to tostring */ if (parse_sip_msg_uri(_msg) < 0) { LM_ERR("R-URI parsing failed\n"); return -1; } if (is_e164(&(_msg->parsed_uri.user)) == -1) { LM_ERR("R-URI user is not an E164 number\n"); return -1; } user_s = _msg->parsed_uri.user.s; user_len = _msg->parsed_uri.user.len; memcpy(&(tostring[0]), user_s, user_len); tostring[user_len] = (char)0; /* * Get E.164 number from pseudo variable */ if (sp && (pv_get_spec_value(_msg, sp, &pv_val) == 0)) { if (pv_val.flags & PV_VAL_STR) { if (pv_val.rs.len == 0 || pv_val.rs.s == NULL) { LM_DBG("Missing E.164 number\n"); return -1; } } else { LM_DBG("Pseudo variable value is not string\n"); return -1; } } else { LM_DBG("Cannot get pseudo variable value\n"); return -1; } if (is_e164(&(pv_val.rs)) == -1) { LM_ERR("pseudo variable does not contain an E164 number\n"); return -1; } user_s = pv_val.rs.s; user_len = pv_val.rs.len; memcpy(&(string[0]), user_s, user_len); string[user_len] = (char)0; As you can see, the function always tries to read the uri for lookup from the R-Uri, whether "sp" (which is needed to be true for using pv) is defined or not. Why do you need sp? I recognized, that enum_query() (without pv) uses a separate function anyway... I would suggest to remove the lines in this function, which try to use the R-URI for enum lookup... Thanks Jasmin