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If the expression DO BYPASS=Y is specified in a Control-M/Tape rule, the data set or data sets specified in the ON DATASET statement of the rule are treated as if the expression EXPDT=98000 was specified for them in the JCL (meaning, no tape management activities are performed for these data sets).
WARNING: When the expression DO BYPASS=Y is specified, tapes may be inadvertently overwritten, because there the protection that is normally provided by Control-M/Tape when it is not bypassed is missing. Therefore, use this expression infrequently and carefully.
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