ICU1048 INCORRECT VALUE SPECIFIED ON PARM CARD FOR OLD SYSTEM MASTER KEY

Explanation
When attempting to change the host master key (CHGM),
the key generator utility encountered a incorrect old host master
key value in the PARM field on the EXEC statement.

System action
Key generator utility processing ends.

Programmer response
Correct the value of the old host master
key in the EXEC statement and rerun the key generator utility program.
To
ensure that you have all the messages issued for this problem, specify
MSGLEVEL=(1,1) for the job.

Source
Cryptographic Unit Support Program (CUSP)