How To Fix RS_B4HTAU_CL_MSG021 - Role '&1' had delta applied already in run '&2'.

SAP Error Message - Details

• Message type: E = Error

• Message class: RS_B4HTAU_CL_MSG -

• Message number: 021

• Message text: Role '&1' had delta applied already in run '&2'.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RS_B4HTAU_CL_MSG021 - Role '&1' had delta applied already in run '&2'. ?

  The SAP error message RS_B4HTAU_CL_MSG021 indicates that a specific role (denoted by &1) has already had a delta applied during a particular run (denoted by &2). This typically occurs in the context of SAP BW (Business Warehouse) or SAP HANA when dealing with data loads and transformations.
  Cause:
  
  Duplicate Delta Load: The error usually arises when there is an attempt to apply a delta load for a role that has already been processed in the same data load run. This can happen if the delta process is triggered multiple times for the same data set.
  Configuration Issues: There may be issues in the configuration of the data flow or the delta mechanism, leading to the system attempting to apply the same delta multiple times.
  Data Consistency: The system is designed to prevent inconsistencies that could arise from applying the same delta multiple times, which is why it raises this error.
  
  Solution:
  
  Check Delta Load Configuration: Review the configuration of the data load process to ensure that the delta loads are set up correctly and that they are not being triggered multiple times inadvertently.
  Monitor Data Load Runs: Use transaction codes like RSA1 (Data Warehousing Workbench) to monitor the data load runs and check the status of the delta loads. Ensure that the delta process is only executed once for each relevant role.
  Adjust Load Logic: If necessary, adjust the logic in the data flow or the transformation rules to prevent the same delta from being applied more than once.
  Re-run the Process: If the delta load was interrupted or failed, you may need to re-run the entire data load process to ensure that all data is correctly processed.
  Consult Documentation: Refer to SAP documentation or notes related to delta processing in BW or HANA for any specific guidelines or updates that may address this issue.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or fixes related to this error message.
  Transaction Codes: Familiarize yourself with transaction codes like RSA1, RSMO, and RSPC for monitoring and managing data loads in SAP BW.
  Delta Mechanism: Understanding how the delta mechanism works in SAP BW and HANA can help in troubleshooting similar issues in the future.
  
  If the problem persists after following these steps, it may be beneficial to engage with SAP support for further assistance.