How To Fix RSM1620 - there could be duplicate data in the data targets

SAP Error Message - Details

• Message type: E = Error

• Message class: RSM1 - Messages for AWB, Scheduler and Monitor (new)

• Message number: 620

• Message text: there could be duplicate data in the data targets

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSM1620 - there could be duplicate data in the data targets ?

  The SAP error message RSM1620 indicates that there may be duplicate data in the data targets during the data loading process in SAP BW (Business Warehouse). This error typically arises when the system detects that the data being loaded into a data target (like an InfoCube or DataStore Object) contains records that are not unique, which can lead to data integrity issues.
  Cause:
  
  Duplicate Records: The most common cause of this error is the presence of duplicate records in the source data or during the transformation process.
  Incorrect Data Modeling: The data model may not be set up correctly, leading to situations where the same data is being loaded multiple times.
  Data Source Issues: The data source might be configured incorrectly, causing it to pull the same records multiple times.
  Transformation Logic: The transformation rules may not be filtering or aggregating data correctly, resulting in duplicates.
  
  Solution:
  
  Check Source Data: Review the source data for duplicates. You can use queries or reports to identify and eliminate duplicate records before they are loaded into BW.
  Review Data Model: Ensure that the data model is designed to handle unique records. Check the primary keys and ensure they are correctly defined.
  Adjust Transformation Logic: Review the transformation rules in the Data Transfer Process (DTP) to ensure they are correctly set up to handle duplicates. You may need to add filters or aggregations to prevent duplicates from being loaded.
  Use DTP Settings: In the DTP settings, you can configure options to handle duplicates, such as "Update Mode" settings (e.g., "Additive" vs. "Overwrite").
  Data Quality Checks: Implement data quality checks in your ETL process to catch duplicates before they reach the data target.
  Error Handling: If duplicates are unavoidable, consider implementing error handling in your data load process to manage how duplicates are treated.
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to error RSM1620 for any specific patches or updates that may address this issue.
  Data Warehousing Best Practices: Familiarize yourself with best practices in data warehousing to prevent duplicate data issues in the future.
  Monitoring and Logging: Utilize SAP BW monitoring tools to keep track of data loads and identify issues early in the process.
  
  By following these steps, you should be able to identify the cause of the RSM1620 error and implement a solution to prevent duplicate data from being loaded into your data targets.