Canon VB-C500D Operation Manual page 138

List of Log Messages
A421 Video control command failed [crit]
Description
%1
Meaning
A422 Video input frozen [crit]
Description
%1
Meaning
A423 Video input error detected [crit]
Description
%1
Meaning
A470 Uploader initialization failed [crit]
Description
%1
Meaning
Countermeasure
Application (audio server) messages
B001 Starting and shutdown of audio server [info]
Description
%1
Meaning
5-12
video%1 command error - <Cause of error> (A421)
Video input number
The video input function was stopped because issuance of an
essential command to the video input system failed.
video%1 stalled (A422)
Video input number
The video input function was stopped because video generation
stopped.
video%1 fatal error - <Error code> (A423)
Video input number
The video input function was stopped because an error that does not
permit recovery of the video input system was detected.
uploader initialization failure - %1 (A470)
Error number
The uploader could not be initialized.
If the problem persists after rebooting the camera, the camera is
faulty.
%1 wvaudio (B001)
starting | shutdown
The audio server was started/shut down