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Parameter DSN is intended for user parameter definition convenience. It is used when a job does not write reports to spool but instead writes reports directly to compressed datasets (using CDAM). In such cases, decollating these reports is performed using ON DSN statements. CDAM retrieval parameters specified in the DSN field are merged with CDAM retrieval parameters which are specified in the ON DSN statements.
Note: Multijob CDAM files, created by using CDAM parameter ALLOCOPT=JOBSDSN1 or ALLOCOPT=JOBSDSN2, cannot be used as input for a report decollating mission.
When the same CDAM parameter is specified in both a DSN field and an ON DSN statement, the parameter in the ON DSN statement overrides the parameter in the DSN field for that specific ON DSN statement (that is, not for all the ON DSN statements in the job).
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