B
CUES Inc., MPlus+ User Manual | CH905
www.cuesinc.com, | salesinfo@cuesinc.com
APPENDIX B
TROUBLESHOOTING CONTINUED
• UNSUPPORTED FILE SYSTEM
o The MPlus rmware update program was unable to locate a volume on the USB Flash
drive formatted with either of the two supported le systems, FAT() or FAT.
o On USB Flash drives containing multiple partitions, only the rst 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,
bytes, supported by the MPlus rmware 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 rst 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 rmware update program was unable to locate a lename that matches
the rmware update le, MPupdate.cfw, in the volume’s “root” directory.
o Check the lename of the rmware update le on the USB Flash drive to make sure
it is named properly, including its three-letter extension. The lename is not case-
sensitive.
o Check the location of the rmware update le 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 rmware update le that was found has failed one of the MPlus rmware update
program’s integrity checks, meaning it contains invalid data that cannot be used.
o Try re-loading the rmware update le onto the USB Flash drive.
o Try obtaining a fresh copy of the rmware update le, either by re-downloading the
original le you received or by requesting a new copy from CUES Customer Service.
• ERROR DURING PROGRAMMING
o Some of the raw rmware data being programmed into memory failed the verication
step, i.e., the data read back diered 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
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