B
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CUES Inc.
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MPlus+ User Manual | CH905
www.cuesinc.com
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APPENDIX B
TROUBLESHOOTING CONTINUED
• UNSUPPORTED FILE SYSTEM
o The MPlus+ firmware update program was unable to locate a volume on the USB Flash
drive formatted with either of the two supported file systems, FAT(16) or FAT32.
o On USB Flash drives containing multiple partitions, only the first primary partition is
examined.
• UNSUPPORTED VOL SECTR SIZE
o The ‘Bytes Per Sector’ parameter of the detected FAT volume is not equal to the value,
512 bytes, supported by the MPlus+ firmware update program.
o This is an uncommon error that should only occur when using a non-standard USB
Flash drive.
• VOLUME MAY BE CORRUPTED
o Information gathered from the FAT volume indicates that it may be corrupted.
o This can result from either: (A) not dismounting the volume properly, e.g., pulling
the USB Flash drive out of a USB port without first using the “Safely Remove…”
feature, or (B) the occurrence of a disk read/write error, indicating that some of the
USB Flash drive’s memory sectors may have gone bad.
• UPDATE FILE NOT FOUND
o The MPlus+ firmware update program was unable to locate a filename that matches
the firmware update file, MPupdate.cfw, in the volume’s “root” directory.
o Check the filename of the firmware update file on the USB Flash drive to make sure
it is named properly, including its three-letter extension. The filename is not case-
sensitive.
o Check the location of the firmware update file on the USB Flash drive to make sure it is
located in the “root”, i.e., not inside of any folder.
• UPDATE FILE IS CORRUPTED
o The firmware update file that was found has failed one of the MPlus+ firmware update
program’s integrity checks, meaning it contains invalid data that cannot be used.
o Try re-loading the firmware update file onto the USB Flash drive.
o Try obtaining a fresh copy of the firmware update file, either by re-downloading the
original file you received or by requesting a new copy from CUES Customer Service.
• ERROR DURING PROGRAMMING
o Some of the raw firmware data being programmed into memory failed the verification
step, i.e., the data read back differed from the data that was written.
o This can result from a problem with the microcontroller on the main circuit board inside
the MPlus+ Control Unit.
MPLUS+ FIELD FIRMWARE UPDATE
