A-Class  99 
 
 
Firmware Update Error Messages  
Displayed Message  Descriptions / Possible Causes / Solutions 
DECOMPRESSION ERROR 
An error occurred during the decompression and transfer of 
file data from cache storage into the Flash memory. Confirm 
the firmware version and try the download again; however, if 
the problem continues call for service.  
ERROR ERASING FLASH 
Flash memory could not successfully be erased. Defective 
Flash memory is a possible cause. Try the download again; 
however, if the problem continues call for service.  
ERROR WRITING FLASH 
The program could not successfully be written into Flash 
memory. Defective Flash memory is a possible cause. Try the 
download again; however, if the problem continues call for 
service.  
HARDWARE MISMATCH 
The firmware downloaded is not compatible with the Main 
Logic CCA, is for a different model printer, or is not supported 
by the boot loader version. See CONFIGURATION LEVEL, 
Section 4.2.4, for details.  
INVALID SOFTWARE 
A error was detected during download, possible causes and 
solutions include: 
 
•  An invalid or corrupted file was downloading. Try resaving 
the file to the host. Download the file to the printer. 
 
•  A communications error occurred. Recheck the cabling and 
port settings.  
SOFTWARE MISMATCH 
The software level being installed is not authorized for this 
printer. See PRINTER KEY, Section 4.2.4, for details.