How To Fix CNV_NCE_BAS186 - Check not possible; you must first save your mapping values

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_NCE_BAS - Number conversion engine: messages

• Message number: 186

• Message text: Check not possible; you must first save your mapping values

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_NCE_BAS186 - Check not possible; you must first save your mapping values ?

  The SAP error message CNV_NCE_BAS186 typically occurs during the data migration process when using the SAP S/4HANA Migration Cockpit or similar tools. This error indicates that the system cannot perform a check on the mapping values because they have not been saved yet. Here’s a breakdown of the cause, solution, and related information for this error:
  Cause:
  
  Unsaved Mapping Values: The primary cause of this error is that the mapping values you are trying to check have not been saved in the system. The migration tool requires that all mapping values be saved before it can perform any checks or validations.
  
  Solution:
  
  
  Save Mapping Values: 
  
  Navigate to the mapping screen where you have defined your mapping values.
  Ensure that you have filled in all necessary fields and then save the mapping values. Look for a "Save" button or option in the interface.
  After saving, try to perform the check again.
  
  
  
  Check for Errors: 
  
  After saving, if you encounter any other errors, review the mapping values for any inconsistencies or missing information that may need to be corrected.
  
  
  
  Reopen the Mapping: 
  
  If the error persists even after saving, try closing and reopening the mapping screen to refresh the session.
  
  
  
  Consult Documentation: 
  
  Refer to the SAP documentation or help files related to the specific migration tool you are using for any additional steps or troubleshooting tips.
  
  
  
  Related Information:
  
  Migration Cockpit: This error is often encountered in the context of using the SAP S/4HANA Migration Cockpit, which is a tool designed to facilitate the migration of data from legacy systems to SAP S/4HANA.
  Data Mapping: Proper data mapping is crucial for successful data migration. Ensure that you have a clear understanding of the source and target data structures.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Support: If you continue to experience issues, consider reaching out to SAP support or consulting with an SAP expert who specializes in data migration.
  
  By following these steps, you should be able to resolve the CNV_NCE_BAS186 error and proceed with your data migration process.