dialplan default.xml has          <action application="set" data="dtmf_type=info"/> prior to the bridge
internal.xml has no dtmf statements uncommented

when sending dtmf from the Polycom dialpad after a barge in using SLA, (also after the barging phone hangs up) I get the following error:

2012-03-01 03:05:53.841090 [ERR] switch_ivr_async.c:547 dmachine overflow error!

FreeSWITCH Version 1.0.head (git-23645b6 2012-02-27 16-49-12 -0600)

Bob McCarthy