How To Fix CNV_MBT_SHELL121 - Check data dictionary of sender system against .STR file definition

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_SHELL - Shell Creation

• Message number: 121

• Message text: Check data dictionary of sender system against .STR file definition

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT_SHELL121 - Check data dictionary of sender system against .STR file definition ?

  The SAP error message CNV_MBT_SHELL121 typically occurs during data migration processes, particularly when using the SAP Migration Cockpit or similar tools. This error indicates that there is a mismatch between the data dictionary of the sender system and the structure definition (.STR file) that is being used for the migration.
  Cause:
  
  
  Data Dictionary Mismatch: The fields in the data dictionary of the sender system do not match the definitions specified in the .STR file. This could be due to:
  
  Changes in the data model of the sender system.
  Incorrect or outdated .STR file being used.
  Missing fields or incorrect data types in the sender system.
  
  
  
  Configuration Issues: The migration configuration may not be set up correctly, leading to discrepancies between the expected and actual data structures.
  
  
  Version Differences: If the sender system is on a different version of SAP than what the migration tool expects, there may be differences in the data structures.
  
  
  Solution:
  
  
  Check the .STR File: 
  
  Review the .STR file to ensure that it accurately reflects the current data dictionary of the sender system. Make sure that all fields, data types, and lengths are correctly defined.
  
  
  
  Verify Data Dictionary:
  
  Access the data dictionary (transaction SE11) in the sender system and compare it with the definitions in the .STR file. Look for any discrepancies in field names, types, and lengths.
  
  
  
  Update the .STR File:
  
  If there are discrepancies, update the .STR file to match the current data dictionary of the sender system. This may involve regenerating the .STR file based on the latest data model.
  
  
  
  Check Migration Configuration:
  
  Ensure that the migration configuration is set up correctly. This includes checking the mapping of fields and ensuring that all necessary configurations are in place.
  
  
  
  Consult Documentation:
  
  Refer to the SAP documentation for the specific migration tool you are using. There may be additional guidelines or troubleshooting steps provided.
  
  
  
  Testing:
  
  After making the necessary adjustments, perform a test migration to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional guidance on data migration issues.
  Migration Cockpit Documentation: Review the official SAP documentation for the Migration Cockpit or the specific migration tool you are using for best practices and troubleshooting tips.
  Community Forums: Consider searching or posting in SAP community forums or SAP support channels for insights from other users who may have encountered similar issues.
  
  By following these steps, you should be able to identify and resolve the cause of the CNV_MBT_SHELL121 error message.