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The CTRX001 exit (Control‑M/Restart Exit 1) is used by Control-R to release tapes which were used by the previous run of the job before the job is restarted.
The exit recognizes the appropriate Control-M/Tape it is working with to support the C-1 concept. The exit interfaces with Control-M/Tape using CTTAPI.
CTRX001 checks the compatibility mode values in IOAPARM for Control‑M/Tape and Control-M/Restart and sets the SSNAME parameter in the CTTAPI call accordingly to one of the following:
CTRX001 (Control‑M/Restart Exit 1) must be defined as an interface between Control‑M/Restart and Control‑M/Tape. This exit must be defined in addition to (not as a replacement for) any previously defined Control‑M/Restart Exit 1 (for example, an interface between Control‑M/Restart and another product such as HSM or CA‑1).
The Control‑M/Restart Driver exit is used to invoke the Control‑M/Tape Interface Exit 1 and any previously defined instances of Exit 1.
When Control-M/Restart Exit 1 is used for the Control-M/Tape interface, it receives dataset DELETE requests and changes the Control-M/Tape controlled dataset status to Scratch. This enables expiration of the specified dataset by the next run of Retention Management the CTTRTM utility. Using customization of this exit, you can cause Control-M/Tape controlled datasets to be scratched immediately (that is, without running the CTTRTM utility).
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