Canon iPF720 User Manual page 607

Messages regarding HP-GL/2
This type of paper is not compatible with HP-GL/2.
The printer has received a HP-GL/2 print job that
cannot be printed on the paper that has been
advanced.
GL2: Wxxxx The memory is full. (xxxx is 0501, 0903, or
0904)
The printer memory is full.
GL2: W0502 The parameter is out of range.
A parameter specied in a HP-GL/2 command is out
of the supported range.
GL2: W0504 This command is not supported.
The printer has received an unsupported HP-GL/2
command.
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Cause
Cause
Cause
Cause
Corrective Action
Replace the paper with a type compatible with
HP-GL/2. For details on paper compatible with
HP-GL/2, refer to the Paper Reference Guide.
(→P.96)
The printer may continue printing, but the printing
quality may be affected. Check the printing results.
Corrective Action
Because the entire print job could not be received,
the printer may not be able to print the entire original.
Check the printing results.
Corrective Action
Check the print job.
Corrective Action
Check the print job.
Messages regarding HP-GL/2
Error Message 593