Xerox DocuPrint 96MX manual IF8409 Missing font mapping header at file offset?

IFU (INTERPRESS FONT UTILITY) MESSAGES

IF8409	Missing font mapping header at file offset?
	The text that was just read from the written file on the medium was
	not as expected. The format of the file written by the WRITE
	command is either corrupted, the READ and WRITE codes are not
	being executed in sync, or a noncopy medium was loaded when a
	read was attempted.
Action	1.	Remount the medium (tape, floppy, etc.), making sure it is the
		correct medium for READ.
		or
	2.	Execute the corresponding WRITE command again for the
		READ that failed
IF8410	Tape file buffering has failed
	There is an error in the system call.
Action	1.	Retry the operation.
	2.	If the retry fails, reboot the system.
IF8420	Internal buffer allocation failed, aborting ADD.
	Memory allocation for a font file has failed.
Action	Contact your systems specialist or Xerox Customer Service.
IF8500	Decomposed FIS file has bad syntax.
	An error occurred while the system was processing an internal
	temporary file.
Action	1.	Reenter the ADD command.

2.If the problem continues, contact your systems specialist or Xerox Customer Support.

IF8501	Fatal error has been detected in font request
	An error occurred while the system was processing the font request.
Action	1.	Reenter the ADD command.
	2.	If the problem continues, contact your systems specialist or
		Xerox Customer Support.

IF8502	Character x returned error code y.
	A character in the decomposed FIS caused an error code to appear.
Action	1. Reenter the ADD command.

2.If the problem continues, contact your systems specialist or Xerox Customer Support.

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