How To Fix DMCLG657 - Combination of input values (line &1) already exists

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 657

• Message text: Combination of input values (line &1) already exists

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG657 - Combination of input values (line &1) already exists ?

  The SAP error message DMCLG657, which states "Combination of input values (line &1) already exists," typically occurs in the context of data entry or configuration where a unique combination of values is required, but the system has detected a duplicate entry.
  Cause:
  
  
  Duplicate Entries: The most common cause of this error is that the combination of input values you are trying to enter already exists in the database. This could be due to:
  
  Manual data entry errors.
  Data imported from external sources that may have duplicates.
  Configuration settings that require unique combinations (e.g., in customizing tables).
  
  
  
  Validation Rules: The system may have validation rules that enforce uniqueness for certain fields or combinations of fields, leading to this error when those rules are violated.
  
  
  Solution:
  
  
  Check Existing Entries: Review the existing entries in the relevant table or transaction to identify if the combination you are trying to enter already exists. You can do this by:
  
  Using transaction codes like SE16 or SE11 to view the relevant database table.
  Searching for the specific combination of values you are trying to enter.
  
  
  
  Modify Input Values: If you find that the combination already exists, you will need to either:
  
  Modify the input values to create a unique combination.
  If the existing entry is incorrect or obsolete, consider deleting or updating it if appropriate.
  
  
  
  Consult Documentation: Review any relevant documentation or configuration settings to understand the uniqueness constraints that are in place.
  
  
  Error Handling: Implement error handling in your data entry process to catch such duplicates before they cause issues.
  
  
  Contact Support: If you are unable to resolve the issue, consider reaching out to your SAP support team or consulting SAP notes for further guidance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with transaction codes that may be relevant to the data you are working with (e.g., SE16 for table display, SE11 for data dictionary).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Data Integrity: Ensure that data integrity checks are in place to prevent duplicate entries in the future.
  User Training: Provide training for users on how to enter data correctly to minimize the chances of encountering this error.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.