[SR-Users] usleep with variable

Hello, been struggling to make a random sleep with cfgutils functions. ex: $avp(i:444) = 123; usleep("$avp(i:444)"); gives an error: ERROR: <core> [route.c:1189]: fix_actions(): fixing failed (code=-1) at cfg:/etc/kamailio/kamailio-sp1new.cfg:723 Kamailio version: 4.3 If usleep accepts only numbers, is there any other way to sleep by passing variable? best regards, Antanas -- # <#> Antanas Masevičius Technikos Direktorius UAB Nacionalinis telekomunikacijų tinklas Panerių g. 51, LT-03160 Vilnius *Tel.* 8 5 2056000 *Tiesiog. tel.* 8 700 00031 *Mob. tel.* 8 685 77730 *Faks.* 8 700 00034 *El. p.:* antanas.masevicius(a)ntt.lt <#> # www.ntt.lt <http://www.ntt.lt> | www.spykas.com <http://www.spykas.com>