How To Fix RSPLS490 - Source characteristic &1 has to be a key field in the DataStore object

SAP Error Message - Details

• Message type: E = Error

• Message class: RSPLS - General Messages

• Message number: 490

• Message text: Source characteristic &1 has to be a key field in the DataStore object

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSPLS490 - Source characteristic &1 has to be a key field in the DataStore object ?

  The SAP error message RSPLS490 indicates that a source characteristic in a DataStore Object (DSO) is not defined as a key field, which is a requirement for certain operations in SAP BW (Business Warehouse) or SAP BW/4HANA.
  Cause:
  The error occurs when you are trying to load data into a DataStore Object, and one of the source characteristics (fields) that you are using in your transformation or data flow is not defined as a key field in the target DataStore Object. In SAP BW, key fields are essential for uniquely identifying records in the DSO.
  Solution:
  To resolve this error, you need to ensure that the source characteristic is defined as a key field in the DataStore Object. Here are the steps to do this:
  
  
  Open the DataStore Object:
  
  Go to the Data Warehousing Workbench (transaction code RSA1).
  Navigate to the DataStore Object in question.
  
  
  
  Edit the DataStore Object:
  
  Select the DSO and choose to edit it.
  Go to the "Key Fields" tab.
  
  
  
  Add the Source Characteristic as a Key Field:
  
  If the source characteristic (e.g., a field from your source system) is not listed as a key field, you need to add it.
  Click on the "Add" button and select the characteristic you want to include as a key field.
  
  
  
  Save and Activate:
  
  After adding the necessary key field(s), save your changes.
  Activate the DataStore Object to ensure that the changes take effect.
  
  
  
  Check Transformation:
  
  If you are using a transformation to load data, ensure that the mapping is correct and that the source characteristic is properly mapped to the key field in the DSO.
  
  
  
  Re-run the Data Load:
  
  After making the necessary changes, re-run the data load process to see if the error is resolved.
  
  
  
  Related Information:
  
  Key Fields in DSO: Key fields are used to uniquely identify records in a DataStore Object. They are crucial for data integrity and for ensuring that data is loaded correctly.
  Data Modeling: Understanding the data model and the relationships between different objects in SAP BW is essential for effective data loading and reporting.
  Transformation Rules: Review the transformation rules to ensure that all mappings are correct and that there are no other issues that could lead to errors during data loading.
  
  If you continue to experience issues after following these steps, consider checking the SAP Notes or consulting with your SAP BW administrator for further assistance.