How To Fix RSDPP108 - Key mapping not possible for source field &1 in transformation &2

SAP Error Message - Details

• Message type: E = Error

• Message class: RSDPP - BW: Data Privacy Protection

• Message number: 108

• Message text: Key mapping not possible for source field &1 in transformation &2

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSDPP108 - Key mapping not possible for source field &1 in transformation &2 ?

  The SAP error message RSDPP108, which states "Key mapping not possible for source field &1 in transformation &2," typically occurs in the context of data transformations in SAP BW (Business Warehouse) when there is an issue with mapping fields between the source and target data structures.
  Cause:
  
  Field Mismatch: The source field specified in the transformation does not exist in the source data source or is not compatible with the target field.
  Data Type Issues: There may be a mismatch in data types between the source field and the target field, which prevents proper mapping.
  Missing Key Mapping: The transformation may require a key mapping that has not been defined or is incomplete.
  Incorrect Transformation Logic: The transformation logic may not be correctly set up to handle the source field.
  Data Source Changes: Changes in the underlying data source structure (like adding or removing fields) that are not reflected in the transformation.
  
  Solution:
  
  Check Field Existence: Verify that the source field (&1) exists in the source data source. If it does not, you may need to adjust the transformation or the data source.
  Review Data Types: Ensure that the data types of the source field and the target field are compatible. If they are not, you may need to convert the data type in the transformation.
  Define Key Mapping: If key mapping is required, ensure that it is properly defined in the transformation settings. You may need to create or adjust the key mapping settings.
  Update Transformation Logic: Review the transformation logic to ensure it correctly handles the source field. Make any necessary adjustments to the mapping rules.
  Refresh Data Source: If there have been changes to the data source, refresh the data source in the transformation to ensure it reflects the current structure.
  Check for Errors in the Transformation: Use the transformation monitor to check for any other errors that may provide additional context for the issue.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like RSA1 (Data Warehousing Workbench) to access the transformation and check its settings.
  Documentation: Refer to SAP Help documentation for detailed information on transformations and data mapping.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Testing: After making changes, test the transformation to ensure that the error is resolved and that data is being loaded correctly.
  
  By following these steps, you should be able to identify and resolve the issue causing the RSDPP108 error in your SAP BW transformation.