An I/O error occurred while the key generator utility program was processing the non-VSAM data set defined by the SYSMKDS or SYSIN DD statement. The format and explanation of the message is in the description of the SYNADAF macro in your VSAM macro instruction book.
Key generator utility processing ends.
See z/OS DFSMS Macro Instructions for Data Sets for the explanation of the message. Correct the problem and rerun the key generator utility program as follows. If the SETM or CHGM function was requested and the host master key was not set (message ICU010I was not issued), rerun the entire job. Otherwise, use this listing to determine which control statements were processed successfully. Then rerun the utility program using the CHGK function to process the remaining control statements.
Notify the security administrator.
To ensure that you have all the messages issued for this problem, specify MSGLEVEL=(1,1) for the job.
Cryptographic Unit Support Program (CUSP)