JCL TYPRUN Parameter

JCL TYPRUN parameter is optional keyword parameter which can be used for –

Specifying whether a job is to be kept on hold until the job is requested to be released.
Syntax checking.

The Syntax for JCL TYPRUN parameter:
TYPRUN=SCAN
or
TYPRUN=HOLD

JCL TYPRUN=SCAN

This is used to scan the JCL for any syntax error without actually allocating any resources for the job.

Example of TYPRUN=SCAN

Explanation

In the above image, TYPRUN=SCAN enables to scan the JCL for syntax related errors without actually allocating any resource to the job. So, this is a good way to test your JCL for any syntax error without actually submitting the JCL and allocating resources.

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JCL TYPRUN=HOLD

JCL TYPRUN=HOLD Parameter is used to avoid any deadlock.

Suppose, we have 2 Jobs i.e. JOBNOHLD and JOBHLD

JOB with no HOLD

//JOBNOHLD JOB (123),’TRAINOOL’,CLASS=A,
// NOTIFY=&SYSUID
//STEP01 DD DSN=MATEKS.TYPRUN.FILE,DISP=SHR

JOB with HOLD

//JOBHLD JOB (123),’TRAINOOL’,CLASS=A,TYPRUN=HOLD,
// NOTIFY=&SYSUID
//STEP01 DD DSN=MATEKS.TYPRUN.FILE,DISP=SHR

Both the jobs are trying to access the same dataset

In this case, both the jobs are trying to access the same dataset i.e. MATEKS.TYPRUN.FILE so, you need to hold one job until the other job has finished its operation.

So, here we have coded TYPRUN=HOLD on the Job JOBHLD. Now, Once the Job JOBNOHLD will complete its execution, we need to release the hold from JOBHLD.

This process is important to prevent deadlock (which is sometimes often called as Contention).

JCL InterView Question and Answers

1. What does TYPRUN = SCAN in a JCL do?

It makes the JCL run fast
It checks only for syntax of JCL and submit the Job
It doesn’t check the syntax of JCL while submitting
It checks only for syntax of JCL and not submit the job

Check Answer

It checks only for syntax of JCL and not submit the job