[Asterisk-Users] zt_rec: Unknown error 500

[Michiel Betel]

I have a number of Zap/ extensions defined in a queue with ringall 
strategy. When this queue is called sometimes Asterisk seems to think 
that one of these channels is busy, while it is NOT. The following is 
shown on the console:
     --Called 44
    -- Called 36
    -- Called 41
    -- Called 35
    -- Called 38
    -- Zap/44-1 is ringing
    -- Zap/36-1 is ringing
    -- Zap/41-1 is ringing
    -- Zap/35-1 is ringing
    -- Zap/38-2 is ringing
    -- Zap/44-1 is ringing
    -- Zap/36-1 is ringing
    -- Hungup 'Zap/35-1'
    -- Zap/41-1 is ringing
    -- Zap/44-1 is ringing
    -- Zap/36-1 is ringing
While a
WARNING[165916]: File chan_zap.c, Line 3331 (zt_read): zt_rec: Unknown 
error 500
is generated in /var/log/asterisk/messages
Any ideas on how to fix this?? Thanks!

Michiel