How To Fix DMC_DTL249 - A formal parameter with the name &1 already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_DTL - Messages for DMC data transfer layer

• Message number: 249

• Message text: A formal parameter with the name &1 already exists

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 DMC_DTL249 - A formal parameter with the name &1 already exists ?

  The SAP error message DMC_DTL249 indicates that there is a conflict due to a formal parameter with the same name already existing in the context where you are trying to define a new parameter. This typically occurs in the context of Data Management and Data Transfer processes, such as when working with Data Migration Cockpit (DMC) or similar tools.
  Cause:
  
  Duplicate Parameter Name: The most common cause of this error is that you are trying to create or define a new parameter in a data transfer or migration process, but a parameter with the same name already exists in the same context.
  Incorrect Configuration: There may be a misconfiguration in the data model or mapping where parameters are defined.
  Copy-Paste Errors: If you are copying and pasting code or configurations, it’s possible to inadvertently create duplicate parameter names.
  
  Solution:
  
  Check Existing Parameters: Review the parameters that are already defined in your data transfer or migration configuration. Look for any parameters with the same name as the one you are trying to create.
  Rename the New Parameter: If you find a duplicate, consider renaming the new parameter to something unique that does not conflict with existing names.
  Modify Existing Parameter: If the existing parameter is not needed, you may choose to modify or delete it, but ensure that this does not affect other parts of your configuration.
  Review Documentation: Check the SAP documentation or help resources for guidelines on naming conventions and parameter definitions to avoid conflicts in the future.
  Testing: After making changes, test the configuration to ensure that the error is resolved and that the data transfer or migration process works as expected.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context or solutions.
  SAP Community: Engage with the SAP Community forums where other users may have encountered similar issues and can provide insights or solutions.
  Data Migration Cockpit (DMC): Familiarize yourself with the DMC and its parameter management to better understand how to avoid such conflicts in the future.
  
  By following these steps, you should be able to resolve the DMC_DTL249 error and proceed with your data migration or transfer tasks.