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

RSPLS490 - Overview

• 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