SMS establishes a recovery environment for the ACS installation exits by issuing an ESTAE before invoking them. ACS installation exit errors occur when:

• The SMS ESTAE exit covering the exit is entered.
• The ACS exit returns an invalid return code.
• The ACS exit returns return code 16.

If any of these errors occur,

• An output message describes the error.
• An SVC dump is taken, SYS1.LOGREC error recording is done, and the failing ACS exit is marked not valid.
• The failed ACS exit is not recalled until the SMS address space is restarted The SMS address space can be restarted with an IPL, or by issuing the SET SMS command if the SMS address space has been ended and not automatically restarted.