[mythtv-users] canceled recording (Recorder Failed) mystery

[David Gesswein]

This error
Excessive channel change retries, commanded 206 got 13 
indicates the script tried several times to switch to channel 206 but
the box kept returning that it was still on channel 13.

Since you indicate it is somewhat repeatable can you directly watch the
TV output of the box during a failed channel change and see what the
on screen display says is happening and if the channel does change?

Are you setting a boxtype on the channel change command?