How To Fix RSBC051 - Source cannot return the same data again

SAP Error Message - Details

• Message type: E = Error

• Message class: RSBC - Messages for DTP Command and Command Templates

• Message number: 051

• Message text: Source cannot return the same data again

INCLUDE RSBC_051 OBJECT DOKU ID TX

Error message extract from SAP system. Copyright SAP SE.

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• What is the cause and solution for SAP error message RSBC051 - Source cannot return the same data again ?

  The SAP error message RSBC051, which states "Source cannot return the same data again," typically occurs in the context of SAP BW (Business Warehouse) when there is an issue with data extraction or data loading processes. This error indicates that the system is trying to extract data from a source that has already been processed, and it is not allowed to return the same data again.
  Causes:
  
  Duplicate Data Extraction: The data source is attempting to extract data that has already been processed in a previous run.
  Incorrect Delta Management: If the delta mechanism is not set up correctly, it may lead to the same data being extracted multiple times.
  Data Source Configuration: The configuration of the data source may not be set up to handle the extraction of new or changed records properly.
  Data Load Process: The data load process may not be correctly identifying new records due to issues with timestamps or other identifiers.
  
  Solutions:
  
  Check Delta Mechanism: Ensure that the delta mechanism is correctly configured. This includes checking the delta queue and ensuring that the data source is set up to capture changes appropriately.
  Review Data Source Settings: Verify the settings of the data source in the SAP BW system. Make sure that it is configured to handle new data correctly and that it is not set to return the same data.
  Reset the Delta Queue: If the delta queue is stuck or not processing correctly, you may need to reset it. This can be done through transaction codes like RSA7 or RSMO.
  Check for Data Consistency: Ensure that the data in the source system is consistent and that there are no issues with the data that could cause it to be interpreted as already processed.
  Reinitialize the Data Source: If necessary, you can reinitialize the data source to clear any issues with the data extraction process. This may involve deleting the existing data in the InfoProvider and reloading it from the source.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes such as RSA1 (Data Warehousing Workbench), RSA7 (Delta Queue Monitor), and RSMO (Monitor Data Load).
  SAP BW Documentation: Review the official SAP BW documentation for best practices on data extraction and delta management.
  SAP Community: Engage with the SAP Community forums for insights and solutions from other users who may have encountered similar issues.
  
  By following these steps, you should be able to diagnose and resolve the RSBC051 error in your SAP BW environment.