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From Serebra Learning Corporation
OS 390 MVS JCL Advanced
... emphasis is on the effective use of symbolic parameters, DDNAME operands, and other coding techniques that can relieve the procedure user of the need for extensive JCL coding. Utility programs and the JCL required to communicate with utilities are also introduced in this course. Other coverage includes analyzing condition codes and system error messages that provide clues to the cause of JCL
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