How To Fix R8254 - DataSource &1 has an inconsistent key info. &3 in language &2

SAP Error Message - Details

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 254

• Message text: DataSource &1 has an inconsistent key info. &3 in language &2

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message R8254 - DataSource &1 has an inconsistent key info. &3 in language &2 ?

  The SAP error message R8254 indicates that there is an inconsistency in the key information of a DataSource. This can occur in various scenarios, particularly when working with SAP BW (Business Warehouse) or SAP Data Services. Here’s a breakdown of the cause, potential solutions, and related information for this error:
  Cause:
  
  Inconsistent Key Fields: The key fields defined in the DataSource do not match the key fields in the target InfoObject or InfoProvider. This can happen if the DataSource was modified after it was created, or if there were changes in the underlying data structure.
  DataSource Activation Issues: If the DataSource was not activated properly after changes were made, it may lead to inconsistencies.
  Transport Issues: If the DataSource was transported from one system to another, there may be discrepancies in the key field definitions.
  Version Mismatch: The version of the DataSource in the source system may not match the version in the target system.
  
  Solution:
  
  Check Key Fields: Verify the key fields defined in the DataSource and ensure they match the key fields in the target InfoObject or InfoProvider. You can do this by navigating to the DataSource in the SAP BW system and checking the field definitions.
  Re-activate the DataSource: If you suspect that the DataSource is not activated properly, try reactivating it. You can do this in the DataSource maintenance transaction (e.g., RSA1).
  Transport Consistency: If the DataSource was transported, ensure that all related objects (like InfoObjects, InfoProviders) were also transported correctly and are consistent across systems.
  Check for Changes: If there have been recent changes to the DataSource or the underlying data structure, review those changes to ensure they are correctly reflected in the DataSource configuration.
  Use Transaction RSA3: You can use transaction RSA3 to test the DataSource and see if it retrieves data correctly. This can help identify if the issue is with the DataSource itself or with the data flow.
  Consult SAP Notes: Check for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: 
  
  RSA1: Data Warehousing Workbench
  RSA3: Extractor Checker
  RSO2: Maintain DataSource
  
  
  Documentation: Refer to SAP Help documentation for detailed information on DataSources and their configuration.
  SAP Community: Engage with the SAP Community forums for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the inconsistency causing the R8254 error message in SAP.