[Karl]

Originally Posted by rkiechle

I received this error message also, had to Factory Restore then wipe cache (which I don't always do when i am going from OMJ to OMJ)

But this time got lots of errors... so Factory Restore and Wipe Cache and then reflash...

Also had to manually install many of my apps they would not restore through titanium backup)

But all seems well and this is just part of the the price we pay for flashing...

try this

Format ALL - Format's boot, cache, data & system partitions

source:
[ Mods ][ 12-21 ] Calkulin's Mods & Fixes [Unlocked Tether l MMS Resize l Reboot Mod] - xda-developers