[asterisk-users] Spawn extension (default, 1002, 2) exited non-zero on 'SIP/host-0819d0d0

[nik600]

Hi

i generate a call from the dialplan in this mode:

exten => 1002,1,Answer()
exten => 1002,2,Dial(SIP/user at host)

the call is generated, but after some seconds it is interrupted, here
the asterisk log:

*CLI>     -- Executing Answer("SIP/host1-0819d0d0", "") in new stack
    -- Executing Dial("SIP/host1-0819d0d0", "SIP/caller at host") in new stack
    -- Called caller at host
    -- SIP/host-081a2610 is ringing
    -- SIP/host-081a2610 answered SIP/host1-0819d0d0
    -- Attempting native bridge of SIP/host1-0819d0d0 and SIP/host-081a2610
  == Spawn extension (default, 1002, 2) exited non-zero on 'SIP/host-0819d0d0'

i've enabled sip debug, but nothing interesing has been showed

host1 is an SJphone and host is a software that implements SIP protocol.

Can you help me to guess where is the problem?

if i try to create a call from SJphone 2 SJphone all works fine.

Is possible that exists a problem in asterisk ?
where ? how can i find it ?

thanks to all

-- 
/*************/
nik600
https://sourceforge.net/projects/ccmanager
https://sourceforge.net/projects/nikstresser