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ENQ/DEQ

By default, exclusive access to a data set is maintained for the duration of its use for move processing. This ensures that needed catalog and scratch actions can be completed successfully. If exclusive control cannot be obtained (other users still accessing the data set) in order to do the processing, an appropriate bypass message will be issued.

By default, shared access to a data set is maintained for the duration of its use for copy processing. If shared control cannot be obtained (another user accessing the data set exclusively) in order to do the processing, an appropriate bypass message will be issued.