How To Fix RSDD751 - A cancelled or active realignment run is blocking this action

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDD - Message class for data manager

• Message number: 751

• Message text: A cancelled or active realignment run is blocking this action

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDD751 - A cancelled or active realignment run is blocking this action ?

  The SAP error message RSDD751 indicates that a realignment run is either currently active or has been cancelled, which is preventing you from performing certain actions in the system. This error typically occurs in the context of SAP BW (Business Warehouse) when you are trying to execute a process that requires the data model to be in a stable state.
  Cause:
  
  Active Realignment Run: A realignment process is currently running, which means that the system is busy processing data and cannot accept new requests that would interfere with this operation.
  Cancelled Realignment Run: A previous realignment run was cancelled, but the system still recognizes it as a blocking process. This can happen if the cancellation did not complete properly or if there are residual locks in the system.
  
  Solution:
  To resolve the RSDD751 error, you can follow these steps:
  
  
  Check Active Processes:
  
  Go to transaction code SM66 (Global Work Process Overview) or SM50 (Work Process Overview) to check if there are any active realignment processes.
  If you find an active realignment process, you may need to wait for it to complete.
  
  
  
  Cancel Stuck Processes:
  
  If a realignment process is stuck or has been running for an unusually long time, you may need to terminate it. You can do this from the same transaction (SM66 or SM50) by selecting the process and choosing to terminate it.
  
  
  
  Check for Locks:
  
  Use transaction SM12 (Display and Delete Locks) to check for any locks that may be preventing the action. If you find locks related to the realignment process, you can delete them if you are sure that it is safe to do so.
  
  
  
  Restart the Realignment Process:
  
  If the realignment process was cancelled and you need to restart it, ensure that all previous locks are cleared and then initiate the realignment process again.
  
  
  
  System Logs:
  
  Check the system logs (transaction SLG1) for any additional error messages or warnings that might provide more context about the issue.
  
  
  
  Consult Documentation:
  
  Refer to SAP Notes or documentation related to your specific version of SAP BW for any known issues or additional troubleshooting steps.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM66: Global Work Process Overview
  SM50: Work Process Overview
  SM12: Display and Delete Locks
  SLG1: Application Log
  
  
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  
  
  SAP Community: Consider checking the SAP Community forums for discussions related to this error, as other users may have encountered and resolved similar issues.
  
  
  By following these steps, you should be able to resolve the RSDD751 error and proceed with your intended actions in SAP BW.