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Pre-Open Processing (TSIDASS)
8-2 User Reference
Connectivity Systems, Inc.—Copyright © 2006
Use Pursuant to Company Instructions
Utility Programs
Pre-Open Processing (TSIDASS)
Description TSIDASS processes controlled files used in programs that do not issue
OPEN requests or that perform pre-open checking of assignments. You
can also use TSIDASS to make assignments to SYSRDR, SYSIPT,
SYSLST, and SYSPCH.
The TSIDASS functions are done with the following control statements:
ASSGN satisfies pre-open assignment checking for tape datasets.
OPEN opens datasets for programs which do not issue an OPEN
request.
RSTRT assists with using IBM checkpoint restart facility.
CHECK determines if a dataset has a version.
TSIDASS must be executed immediately before the program that requires
pre-open assignment checking or that does not do an OPEN. You must
inhibit LUB allocation for all datasets in the TSIDASS step using the
appropriate option codes on the TLBL statements and DLBL statements
in the step.
Note:Note:
Pre-open assignment checking can also be satisfied with the DD
parameter OPTION=SYSnnn. In that case, TSIDASS is not required.
JCL
Requirements
The following is an example of the JCL requirements.
dataset labels
// EXEC TSIDASS
control statements
/*
// EXEC <program without an open or that does pre-open assignment checking>
When using TSIDASS, place the labels for all datasets before the EXEC
statement. Do not place any labels between the EXEC statement for
TSIDASS and the EXEC statement for your program.
UPSI Values There are no UPSI values.
ASSGN
Statements
Use the ASSGN function for tape datasets only. This satisfies pre-open
assignment checking by assigning a logical unit to a dummy tape device.
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