[Freeswitch-users] conference mode [ERR] switch_ivr_async dmachine overflow error!

Hi trying to send DTMF as conference admin for invite some external number to conference. DTMF sends by programm. When dtmf sends i see this error [ERR] switch_ivr_async dmachine overflow error! And then dialplan not works for call this number. I see all INFOs with needed digits but after each info (read after each digit) i see this error it looks like i sending INFO's too fast. Anyone had this issue before and may be resolved it?