The UL (Unlabeled) command, which is used in response to a NO FILE message, assigns an unlabeled file on an indicated unit to a task.
Syntax

Explanation
<mix number> UL <device type> <unit number>
Assigns the unlabeled file located on the specified device to the task with the specified mix number:
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The device type mnemonic must be either MT or SC.
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If a labeled file is assigned to a task in this way, all records of the file, including the label, are read as data.
Example
This example shows a UL command that is entered in response to a "NO FILE" message in the waiting entries queue. The system assigns an unlabeled file on MT113 to the task with the mix number 4363.
W
-----WAITING ENTRIES----- 4361/4363 50 SYSTEM/DUMPALL NO FILE DUMPALLDMPMT
4363 UL MT113