How To Fix UAC002 - &1 entry was reloaded into the undo stack

SAP Error Message - Details

• Message type: E = Error

• Message class: UAC -

• Message number: 002

• Message text: &1 entry was reloaded into the undo stack

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message UAC002 - &1 entry was reloaded into the undo stack ?

  The SAP error message UAC002 indicates that an entry was reloaded into the undo stack. This typically occurs in the context of the SAP system's handling of user actions, particularly in the area of user interface (UI) and data management. The error suggests that there was an attempt to modify or delete an entry that has already been modified or deleted, leading to a conflict in the undo stack.
  Cause:
  
  
  Concurrent Modifications: The most common cause of this error is that multiple users or processes are trying to modify the same data simultaneously. When one user modifies an entry, and another user tries to perform an action on the same entry, the system may reload the entry into the undo stack to maintain data integrity.
  
  
  Session Management Issues: If a user has multiple sessions open and is working on the same data in different sessions, this can lead to conflicts and trigger the UAC002 error.
  
  
  Data Consistency: The system is designed to ensure that the data remains consistent. If an entry is modified after it has been loaded into the undo stack, the system will reload it to ensure that the latest version is being used.
  
  
  Solution:
  
  
  Refresh the Data: If you encounter this error, try refreshing the data or reloading the screen. This can help to synchronize the data and resolve the conflict.
  
  
  Check for Concurrent Users: If you are working in a multi-user environment, check if other users are modifying the same data. Communicate with your team to avoid simultaneous modifications.
  
  
  Single Session Usage: Limit your work to a single session when making changes to avoid conflicts. If you need to work on multiple tasks, consider using different transactions or screens that do not interact with the same data.
  
  
  Error Handling: Implement proper error handling in your custom code (if applicable) to manage such conflicts gracefully. This may involve catching exceptions and providing user-friendly messages or options to retry the operation.
  
  
  Consult Documentation: Refer to SAP documentation or support notes related to the specific transaction or module you are working with. There may be specific guidelines or patches available for your version of SAP.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the UAC002 error. SAP frequently updates its knowledge base with solutions for common errors.
  Transaction Logs: Review transaction logs to identify the sequence of actions that led to the error. This can help in diagnosing the root cause.
  User Training: Ensure that users are trained on how to properly handle data in the SAP system, especially in environments where multiple users are accessing the same data.
  
  If the problem persists after trying the above solutions, it may be necessary to contact SAP support for further assistance.