Trying to do a lua-based bit of IVR and inexplicably struggling with this bit. Maybe something to do with use of variables in session:playAndGetDigits or possibly the regexp? destnum = getDestNumber() session:execute("log", "INFO User dialled "..destnum) confPrompt = "say:'Now calling telephone number "..destnum.."'" session:execute("log", "INFO Confirming with "..confPrompt) confirmkey = session:playAndGetDigits(0, 1, 1, 1000, "#", confPrompt, "", "\\d|\\*") session:execute("log", "INFO mcm.lua Number confirm (not) interrupted with "..confirmkey.." mcmoption="..mcmoption) if confirmkey == "*" then -- return to call break end session:execute("transfer","-bleg "..destnum.." XML dp"..tenant_id) The problem is with confirmkey = session:playAndGetDigits(0, 1, 1, 1000, "#", confPrompt, "", "\\d|\\*") It complains of "Invalid Args" (and doesn't say anything). All it has to do is read out the number that it's intending to call, allowing the user to change their mind by hitting *. Logfile reports: 2012-06-18 14:00:22.975225 [INFO] mod_dptools.c:1444 mcm2.lua getDestNumber 2012-06-18 14:00:22.975225 [DEBUG] switch_ivr_play_say.c:1309 Codec Activated L16@8000hz 1 channels 20ms 2012-06-18 14:00:26.035180 [DEBUG] switch_rtp.c:3457 RTP RECV DTMF 1:1040 2012-06-18 14:00:26.035180 [DEBUG] switch_ivr_play_say.c:1682 done playing file /home/oev/fs-pabx/prompts/dmsb12_mcm3.wav 2012-06-18 14:00:26.205278 [DEBUG] switch_rtp.c:3457 RTP RECV DTMF 2:720 2012-06-18 14:00:26.605240 [DEBUG] switch_rtp.c:3457 RTP RECV DTMF 3:1040 2012-06-18 14:00:27.415292 [DEBUG] switch_rtp.c:3457 RTP RECV DTMF #:1120 2012-06-18 14:00:27.415292 [DEBUG] switch_ivr_play_say.c:2026 Test Regex [123][\d+] EXECUTE sofia/internal/898000000000202074904605@193.105.54.10 log(INFO User dialled 123) 2012-06-18 14:00:27.415292 [INFO] mod_dptools.c:1444 User dialled 123 EXECUTE sofia/internal/898000000000202074904605@193.105.54.10 log(INFO Confirming with say:'Now calling telephone number 123') 2012-06-18 14:00:27.415292 [INFO] mod_dptools.c:1444 Confirming with say:'Now calling telephone number 123' 2012-06-18 14:00:27.415292 [ERR] switch_ivr_play_say.c:1174 Invalid Args EXECUTE sofia/internal/898000000000202074904605@193.105.54.10 log(INFO mcm.lua Number confirm (not) interrupted with mcmoption=8) 2012-06-18 14:00:28.425260 [INFO] mod_dptools.c:1444 mcm.lua Number confirm (not) interrupted with mcmoption=8 EXECUTE sofia/internal/898000000000202074904605@193.105.54.10 transfer(-bleg 123 XML dp0)