How To Fix /STMC/CR_MSG721 - Error while starting repository UOW; another UOW is already active

/STMC/CR_MSG721 - Overview

• Message type: E = Error

• Message class: /STMC/CR_MSG -

• Message number: 721

• Message text: Error while starting repository UOW; another UOW is already active

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message /STMC/CR_MSG721 - Error while starting repository UOW; another UOW is already active ?

  The SAP error message /STMC/CR_MSG721 indicates that there is an issue with starting a new Unit of Work (UOW) because another UOW is already active. This typically occurs in the context of SAP's Change Request Management (ChaRM) or when working with transport requests and repositories.
  
  Cause:
  
  Active UOW: The primary cause of this error is that there is already an active Unit of Work in the system. This can happen if a previous operation has not been completed or has been left hanging.
  System Lock: Sometimes, a system lock or a session that has not been properly closed can lead to this error.
  Concurrency Issues: If multiple users or processes are trying to initiate a UOW simultaneously, it can lead to conflicts.
  
  
  Solution:
  
  Check Active UOWs: Use transaction codes like SM12 (to check for locks) or SM21 (to check system logs) to identify if there are any active UOWs or locks that need to be resolved.
  Complete