[SR-Users] Issue with non static values for sleep in the Async module

Hi I am having an issue with the Async module. The async_route function doesn't seem able to take a dynamic value as is it's duration. The module docs states: The sleep parameter represent the number of seconds to suspend the processing of a SIP request. Maximum value is 100. The parameter can be a static integer or a variable holding an integer. Docs here: http://kamailio.org/docs/modules/4.2.x/modules/async.html#async.f.async_rou… However when I try: async_route("WITHINDLG_DELAYED", $avp(buffer_duration) ); I get the following error when trying to restart kamailio: parse error in config file /etc/kamailio/switchsoftk amailio/includes/deployments/develop/callprocessing/../../../default.cfg, line 866, column 41-61: function async_route: parameter 2 is not constant ... failed! I also tried with $var instead of an AVP, and even tried having perl call the function (since we have gotten around this sort of limitation in the past using perl). Perl gives: Jan 24 03:27:07 develop-callprocessing /usr/sbin/kamailio[1424]: ERROR: app_perl [kamailioxs.xs:289]: moduleFunc(): Module function 'async_route' is unsafe. Call is refused. Jan 24 03:27:07 develop-callprocessing /usr/sbin/kamailio[1424]: ERROR: app_perl [kamailioxs.xs:986]: XS_Kamailio__Message_moduleFunction(): calling module function 'async_route' failed. Missing loadmodule? I have gotten around this issue with a large if else structure like the following: if ($avp(buffer_duration) == 1) { async_route("WITHINDLG_DELAYED", 1); } else if ($avp(buffer_duration) == 2) { async_route("WITHINDLG_DELAYED", 2); ......... This is messy but works for us. The bug is not blocking our progress due to this work around but I wanted to post it any way incase it helps improve the module. All the best. Will Ferrer Switchsoft