How To Fix TG551 - Program already active (ENQUEUE pending)

TG551 - Overview

• Message type: E = Error

• Message class: TG - Messages for Upgrade Repository Switch

• Message number: 551

• Message text: Program already active (ENQUEUE pending)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message TG551 - Program already active (ENQUEUE pending) ?

  The SAP error message TG551 ("Program already active (ENQUEUE pending)") typically occurs when a user attempts to start a program that is already running in the background or is locked due to an enqueue lock. This can happen in various scenarios, such as when a job is scheduled to run, or when a user tries to execute a report that is already being processed.
  
  Cause:
  
  Program Already Running: The program or report you are trying to execute is already active in the system.
  Enqueue Lock: The program has an enqueue lock that prevents it from being executed again until the current instance finishes or the lock is released.
  Long-Running Jobs: If the program takes a long time to execute, it may still be running when you try to start it again.
  System Configuration: There may be system settings or configurations that limit the number of concurrent executions of a program.
  
  
  Solution:
  
  Check Active Jobs: Use transaction codes