Canon IMAGERUNNER C2550 Printer Manual page 227

PDL PDF Transparency Error
Cause There are transparent objects in the PDF data that the machine cannot process.
Remedy 1 After canceling the print job, optimize the PDF or flatten the transparent object
and convert it into a format that the machine can process and print again. (See
the Adobe Acrobat Help.)
Remedy 2 Perform [Error Skip] and continue printing. However, the data will not be printed
correctly.
NOTE
If 'Auto Continue' is set to [On], this error is skipped automatically. (See "Auto Continue,"
on p. 3-26.)
PDL UFR II DL Mem. Full
Cause There is not enough memory to register the character set.
Remedy 1 Set the Graphics Mode in the UFR II printer driver to 'Raster Mode' and print the
data again. (See the Help function on the UFR II printer driver.)
Remedy 2 After canceling the print job, reset the printer to increase the amount of
available memory and print again. (Note that print data in memory such as
secured print jobs and any jobs being processed will be deleted.) (See "Reset
Printer," on p. 3-100.)
Remedy 3 Perform [Error Skip] and continue printing. However, the data will not be printed
correctly.
NOTE
If 'Auto Continue' is set to [On], this error is skipped automatically. (See "Auto Continue,"
on p. 3-26.)
PDL UFR II Invalid Data
Cause An error occurred while processing data in UFR II Raster Mode.
Remedy After canceling the print job, try printing again with a printer driver version that is
compatible with the machine.
When a Message Is Displayed
Error Skip
Error Skip
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