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How to run a job in 1 session only?


although I searched the forum and found some proposals close to my issue, I would like to ask just in case to be sure I have correct answer:

[Q] I have a program (with attached transaction code) which usualy runs as a task in background job, but may be started in foreground also. What I need is to prevent possiblity to start it in two paralel sessions (as per server context, not per frontend).

Is it possible and what is the proper way to do that?

Many thanks in advance.


Ivaylo Mutafchiev

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2 Answers

  • Best Answer
    Posted on Feb 14, 2005 at 04:33 PM

    Yes, I believe that this is achieved by placing a lock on the program name during execution. Here is a sample.

    report zrich_0001 .
    call function 'ENQUEUE_E_TRDIR'
    *   MODE_TRDIR           = 'X'
       name                 = sy-repid
    *   X_NAME               = ' '
    *   _SCOPE               = '2'
    *   _WAIT                = ' '
    *   _COLLECT             = ' '
    *   FOREIGN_LOCK         = 1
    *   SYSTEM_FAILURE       = 2
    *   OTHERS               = 3
    if sy-subrc <> 0.
    check sy-subrc = 0.


    Rich Heilman

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  • Posted on Feb 14, 2005 at 04:32 PM

    Hi Ivaylo Mutafchiev,

    I have a couple of questions in regards to your requirement.

    By "prevent possibility to start in two parallel sessions(as per server context, not per frontend)", do you mean

    that multiple users can run it, but no two users run it on the same server(in a multi-server environment)?

    or do you want to prevent from one user executing the program in the foreground at the same time when the program is running in the background?

    Please give some more details around your requirement.



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    • Former Member


      I'm sorry I was misleading - wrote that in a hurry.

      Well, what I meant was:

      to prevent 2 users to run it on the same server. We have ordinary configuration with DEV, QAS & PS systems, and I would like to have only 1 instance (sesstion) of the program running per server at particular moment, no matter foreground or background.

      I believe Rich gave me the solution I was searching for - tested and implemented it already.

      Thanks again.


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