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The CTTMUP utility can be used to update information in the Media database, the Stacking database and the Trace file. This utility is especially useful for modification of information for a small number of data sets or volumes (for example, to correct file integrity errors that resulted from a system crash or a utility abend).
WARNING: The CTTMUP utility modifies your tape management information. Use this powerful utility with caution.
Note: Before running the CTTMUP utility, it is important to familiarize yourself with the structure of the file you are planning to update, as described in Control-M/Tape chapter of the INCONTROL for z/OS Administrator Guide. Attempting to update tape management information without proper understanding of the structure of the relevant file can lead to integrity errors.
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