How To Fix DT654 - Number of key fields in generic key: &1 -> &2

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 654

• Message text: Number of key fields in generic key: &1 -> &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 DT654 - Number of key fields in generic key: &1 -> &2 ?

  The SAP error message DT654 indicates an issue related to the number of key fields in a generic key. Specifically, it suggests that there is a mismatch between the expected number of key fields and the actual number of key fields defined in the data structure or table.
  Cause:
  The error typically arises in the following scenarios:
  
  Mismatch in Key Fields: The number of key fields defined in the data source (like a table or structure) does not match the number of key fields expected by the program or function module.
  Incorrect Data Source Definition: If you are using a generic data source or a custom data source, it may not be correctly defined in terms of its key fields.
  Changes in Data Model: If there have been recent changes to the underlying data model (like adding or removing key fields), it may lead to this error if the changes are not reflected in the relevant data source or program.
  
  Solution:
  To resolve the DT654 error, you can take the following steps:
  
  
  Check Data Source Definition:
  
  Go to the relevant data source definition in the SAP system (e.g., transaction RSA1 for Data Warehousing).
  Verify the number of key fields defined in the data source and ensure it matches the expected number.
  
  
  
  Adjust Key Fields:
  
  If you are using a custom data source, ensure that the key fields are correctly defined in the ABAP code or data source settings.
  If necessary, adjust the key fields in the data source to match the expected structure.
  
  
  
  Review Changes:
  
  If there have been recent changes to the data model, review those changes to ensure that they are correctly implemented in the data source.
  If you have removed or added key fields, make sure to update the data source accordingly.
  
  
  
  Test the Data Source:
  
  After making adjustments, test the data source to ensure that it is functioning correctly and that the error no longer occurs.
  
  
  
  Consult Documentation:
  
  If you are unsure about the expected key fields, consult the SAP documentation or the data model documentation for guidance.
  
  
  
  Related Information:
  
  Transaction Codes: Use transaction codes like RSA1 (Data Warehousing Workbench) or SE11 (Data Dictionary) to check the definitions of tables and data sources.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Debugging: If the issue persists, consider debugging the program or function module that is generating the error to identify the exact point of failure.
  
  By following these steps, you should be able to identify and resolve the cause of the DT654 error in your SAP system.