I called up one person then did a call with target to another person and the 3-way call went ok, until I tried to release them into speaking with each other.
At that point the two parties reported that the system told them about an invalid extension.
The agent login reports VERSION: 2.0.105 BUILD: 61221-1212
And log/asterisk/full shows:
Mar 14 13:10:48 DEBUG[25131] channel.c: Scheduling timer at 0 sample intervals
Mar 14 13:10:48 VERBOSE[25131] logger.c: == Spawn extension (default, 90009*CL_1001_L**9**7077710773*203*, 0) exited non-zero on 'IAX2/binfone-16384'
Mar 14 13:10:48 VERBOSE[25131] logger.c: -- Sent into invalid extension '90009*CL_1001_L**9**7077710773*203*' in context 'default' on IAX2/binfone-16384
Mar 14 13:10:48 VERBOSE[25131] logger.c: -- Executing Playback("IAX2/binfone-16384", "invalid") in new stack
-HJC