[Freeswitch-users] having problem getting return value from lua script

when i was trying to get return value from lua script (with which sql query was processed), <action application="set" data="myvar=${expand(luarun GetDataFromDB.lua ${caller_id_number})}"/> <action application="info" data="myvar=${myvar}"/> GetDataFromDB.lua -------------------------------------- callerid = argv[1] -- DB sql query ... varout = callerid..'abc' return varout the info shows "myvar=+OK.......", then i tried <action application="set" data="myvar=${expand(lua GetDataFromDB.lua ${caller_id_number})}"/> -- using lua GetDataFromDB.lua instead of luarun GetDataFromDB.lua the info shows an empty string, "myvar=". how to get the return value from lua script?