Hi 
I have this problem and i don’t know what is wrong… I’m using freepbx. In my logs i have all the time the message:
pbx.c: Channel ‘SIP/111-08cf77b8’ sent into invalid extension ‘return’ in context ‘from-internal’, but no invalid handler
Part of my extensions_additional.conf file
[ext-local]
include => ext-local-custom
exten => 111,1,Macro(exten-vm,novm,111)
exten => 111,n,Goto(${IVR_CONTEXT},return,1)
exten => 111,hint,SIP/111
exten => 222,1,Macro(exten-vm,novm,222)
exten => 222,n,Goto(${IVR_CONTEXT},return,1)
exten => 222,hint,SIP/222
exten => vmret,1,GotoIf($["${IVR_RETVM}" = "RETURN" & "${IVR_CONTEXT}" != ""]?playret)
exten => vmret,n,Hangup
exten => vmret,n(playret),Playback(exited-vm-will-be-transfered&silence/1)
exten => vmret,n,Goto(${IVR_CONTEXT},return,1)
; end of [ext-local]
[from-did-direct-ivr]
include => from-did-direct-ivr-custom
exten => 111,1,ExecIf($["${BLKVM_OVERRIDE}" != ""],dbDel,${BLKVM_OVERRIDE})
exten => 111,n,Set(__NODEST=)
exten => 111,n,Goto(from-did-direct,111,1)
exten => 222,1,ExecIf($["${BLKVM_OVERRIDE}" != ""],dbDel,${BLKVM_OVERRIDE})
exten => 222,n,Set(__NODEST=)
exten => 222,n,Goto(from-did-direct,222,1)