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MF_UCC11

Syntax:

MF_UCC11=y|n|M

Description

Enables emulation of UCC11, the JCL job re-start functionality. This environment variable affects data set disposition processing in the following ways:

  • If UCC11 is enabled, a data set disposition of NEW is accepted even if the data set already exists. The features that this environment variable enables are:

Properties:

Y
JCL job re-start functionality is enabled. When restarting a job with DISP=(NEW,CATLG), datasets will not result in job failure due to the dataset already being cataloged.
M

On a restart a catalogued a dataset is presumed to have an initial disposition of MOD rather than NEW. As a result, any new data is appended to the existing dataset.

N
JCL job re-start functionality is disabled.
Default: n (No)
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