TSSMAINT was run to initialise a new Security File, with the AESENCRYPT Option. When running the TSSXTEND Job, to copy the old (Backup) Security File to the new Security File, a S0C4-04 abend in 'No Active Module' occurred.
Running TSSXTEND to convert a File to the AES Encrypted Format must be done on a CA Top Secret r14.0 or CA Top Secret r15.0 System. The AES Encryption Routines aren't within TSSXTEND, and aren't available on a CA Top Secret r12.0 System. So, while you can 'Steplib' to the CA Top Secret r14.0 CAILOAD Library, for the TSSXTEND Job, requesting AES Encryption can't be done until TSSXTEND is run on a System running CA Top Secret r14.0.