How To Fix CNV_DMC_MC_EXCEPTION120 - Value &1 not allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 120

• Message text: Value &1 not allowed

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 CNV_DMC_MC_EXCEPTION120 - Value &1 not allowed ?

  The SAP error message CNV_DMC_MC_EXCEPTION120 Value &1 not allowed typically occurs during data migration processes, particularly when using the SAP Data Migration Cockpit (DMC) or during the execution of a migration project. This error indicates that a specific value being processed is not permitted according to the defined rules or constraints in the target system.
  Cause:
  
  
  Invalid Data Value: The value &1 that is being processed does not meet the criteria set in the target system. This could be due to:
  
  Data type mismatches (e.g., trying to insert a string into a numeric field).
  Values that are outside of the allowed range (e.g., negative values in a field that only accepts positive numbers).
  Values that do not exist in the reference tables (e.g., trying to use a status code that is not defined).
  
  
  
  Configuration Issues: The target system may have specific configurations or settings that restrict certain values, which may not be aligned with the source data.
  
  
  Data Mapping Errors: During the mapping of fields from the source to the target, there may have been an error in defining how certain values should be transformed or validated.
  
  
  Solution:
  
  
  Check the Value: Identify the specific value that is causing the error by looking at the logs or the error message details. Replace &1 with the actual value to understand what is being rejected.
  
  
  Validate Data: Review the data being migrated to ensure that it adheres to the constraints of the target system. This may involve:
  
  Checking data types and formats.
  Ensuring that all values are within the acceptable range.
  Verifying that all reference values exist in the target system.
  
  
  
  Adjust Mapping: If the error is due to incorrect mapping, adjust the data mapping configuration in the migration cockpit to ensure that values are transformed correctly.
  
  
  Consult Documentation: Refer to the SAP documentation for the specific migration project you are working on. There may be guidelines or constraints listed that can help you understand what values are allowed.
  
  
  Test with Sample Data: If possible, run a test migration with a smaller subset of data to isolate the issue and verify that the changes you make resolve the error.
  
  
  Seek Support: If the issue persists, consider reaching out to SAP support or consulting with a technical expert who has experience with data migration projects.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional context.
  Migration Cockpit Documentation: Review the official SAP documentation for the Data Migration Cockpit for best practices and troubleshooting tips.
  Community Forums: Engage with the SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to identify the root cause of the error and implement a solution to resolve it.