
Specifying the DD Statement Special DD Names
Chapter 6. BIM-EPIC DD Statements 6-5
Special DD Names
Many ddnames have special purposes in MVS. This affects how the BIM-EPIC DD facility
processes them.
Statements containing unsupported ddnames are ignored by the BIM-EPIC DD system and
treated as comments by VSE. Use standard VSE JCL to define datasets processed with these
names.
The following ddnames are not supported:
•
JOBLIB
• STEPLIB
• SYSCHK
• SYSCKEOV
• SYSOUT
•
SYSPRINT (changed automatically to SYSOUT)
The following ddnames have special meaning to BIM-EPIC. If a program's DTF uses one of
these names for a different purpose, use standard VSE JCL to define the dataset.
• JOBCAT
•
STEPCAT
• SYSABEND
• SYSMDUMP
• SYSUDUMP
•
SYSIN
JOBCAT and STEPCAT define VSAM catalogs to be used for VSAM clusters. In the BIM-
EPIC DD facility (but not in MVS), they also define catalogs to be used for VSAM/SAM
datasets.
JOBCAT defines the catalog for the entire job stream. STEPCAT defines the catalog for a
step. STEPCAT overrides a JOBCAT definition for that step.
A JOBCAT DD must immediately follow the JOB statement. A STEPCAT DD must precede
all VSAM labels which require that catalog.
//JOB VSAM UPDATE
* //JOBCAT DD DSN=VSAM.JOB.CATALOG,DISP=SHR
.
* //STEPCAT DD DSN=VSAM.STEP.CATALOG,DISP=SHR
vsam labels
// EXEC PROGRAM
/&
Description
Unsupported DD
Names
DD Names with
Special Meanings
JOBCAT and
STEPCAT
Example
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