6027-3705 [E] Incorrect FEK length after unwrapping; the operation was cancelled.
Explanation
When opening an existing encrypted file, the size
of the FEK that was unwrapped did not correspond to the one recorded
in the file's extended attributes. Either the cryptographic extended
attributes were damaged, or the master key(s) used to unwrap the FEK
have changed.
User response
Check for other symptoms of data corruption, and
verify that the configuration of the key server has not changed.