If this is part of a group, or a duplex you can look at those parameters. If you init the drive, you will lose all the field programmable parameters. The f mismatch is saying that one or more of the field programmable parameters stored in the drive, do not match the the the ones stored in the Miprom. you should check them one by one. parameters such as motor RPM's, car speed, armature amps, the list goes on.Check these in MSU adjust, and drive adjust screens.