How To Fix R3126 - Error during generation: Incorrect DS type '&1' for program class '&2'

SAP Error Message - Details

• Message type: E = Error

• Message class: R3 - Service API messages

• Message number: 126

• Message text: Error during generation: Incorrect DS type '&1' for program class '&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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message R3126 - Error during generation: Incorrect DS type '&1' for program class '&2' ?

  The SAP error message R3126 indicates that there is an issue with the data source (DS) type being used in relation to the program class specified. This error typically arises during the generation of a program or report in the SAP system, and it suggests that the data source type does not match the expected type for the given program class.
  Cause:
  
  Incorrect Data Source Type: The data source type specified in the program does not match the expected type for the program class. This could be due to a configuration error or a mismatch in the definitions.
  Program Class Misconfiguration: The program class may not be properly configured to handle the specified data source type.
  Custom Development Issues: If the program is custom-developed, there may be issues in the code that lead to this mismatch.
  
  Solution:
  
  Check Data Source Type: Verify the data source type being used in the program. Ensure that it is compatible with the program class. You can do this by checking the definitions in the relevant transaction codes (e.g., SE11 for Data Dictionary).
  Review Program Class Configuration: Check the configuration of the program class to ensure it is set up to handle the specified data source type. This may involve reviewing the settings in transaction codes like SE80 or SE38.
  Adjust Custom Code: If the program is custom-developed, review the code to ensure that the data source type is correctly defined and used. Make necessary adjustments to align with the expected types.
  Consult Documentation: Refer to SAP documentation or notes related to the specific program class and data source types to ensure compliance with SAP standards.
  Testing: After making changes, regenerate the program or report to see if the error persists. Testing in a development environment before moving to production is advisable.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE80 (Object Navigator), SE38 (ABAP Editor).
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance.
  Debugging: If the issue is not resolved, consider using the debugging tools in SAP to trace the execution and identify where the mismatch occurs.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP Basis or ABAP developer for further assistance.