If you select option U, the specified data set name is uncataloged. There is no need for the specified data set to be allocated or for the volume on which it resides to be mounted.

If the catalog entry being removed contains an expiration date in the future, a confirmation panel is displayed. Press Enter if you want to confirm the uncatalog request, otherwise press END to cancel the request.

You cannot use option U to uncatalog a data set that resides on a Storage Management Subsystem volume. However, the system uncatalogs these data sets when you delete them, which is done by using option D of either the Data Set utility (option 3.2) or the Data Set List utility (option 3.4).