An overview of DFHCSDUP

The CICS® system definition utility program (DFHCSDUP) is a component of resource definition online (RDO). DFHCSDUP is an offline utility program that allows you to read from and write to a CICS system definition (CSD) file, either while CICS is running or while it is inactive.

Using DFHCSDUP, you can do the following:

You can invoke DFHCSDUP in two ways:

DFHCSDUP as a part of the resource definition process is described in the the CICS Resource Definition Guide.

Related concepts
DFHCSDUP as a part of the resource definition process
Related tasks
Invoking a user program from DFHCSDUP
Invoking DFHCSDUP from a user program
Related reference
The user exit points in DFHCSDUP
The sample program, DFH$CUS1
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