How To Fix CNV_MBT_DEX121 - Exception occurred in FM &, sy-subrc = &.Control file data import failed.

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_MBT_DEX - DMIS Data Extract related messages

• Message number: 121

• Message text: Exception occurred in FM &, sy-subrc = &.Control file data import failed.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CNV_MBT_DEX121 - Exception occurred in FM &, sy-subrc = &.Control file data import failed. ?

  The SAP error message CNV_MBT_DEX121 indicates that there was an exception during the execution of a function module (FM) related to the data import process in a conversion or migration project, typically associated with the SAP Landscape Transformation (SLT) or data migration tools.
  Cause:
  The error can occur due to several reasons, including but not limited to:
  
  Data Format Issues: The control file being imported may have incorrect formatting or invalid data that does not conform to the expected structure.
  Missing or Incorrect Configuration: There may be missing configuration settings or incorrect parameters in the migration project.
  Authorization Issues: The user executing the import may not have the necessary authorizations to perform the operation.
  Function Module Errors: The function module being called may have internal errors or may not be implemented correctly.
  Database Constraints: There may be constraints in the database that prevent the import of certain records (e.g., primary key violations, foreign key constraints).
  
  Solution:
  To resolve the CNV_MBT_DEX121 error, you can follow these steps:
  
  Check the Control File: Review the control file for any formatting issues or invalid data. Ensure that all required fields are present and correctly formatted.
  Review Logs: Check the application logs (transaction SLG1) for more detailed error messages that can provide insights into what went wrong during the import process.
  Verify Configuration: Ensure that all necessary configurations for the migration project are correctly set up. This includes checking the settings in transaction LTMC or any relevant migration tools.
  Check Authorizations: Ensure that the user executing the import has the necessary authorizations to perform the operation.
  Debugging: If you have access to the ABAP development environment, you can debug the function module that is causing the error to identify the exact point of failure.
  Consult Documentation: Refer to SAP documentation or notes related to the specific migration tool you are using for any known issues or additional troubleshooting steps.
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SLG1 (Application Log), LTMC (Migration Cockpit), and SE37 (Function Module).
  SAP Notes: Search for SAP Notes related to CNV_MBT_DEX121 or the specific function module mentioned in the error message for any patches or updates that may resolve the issue.
  Migration Tools: Understand the specific migration tools you are using (e.g., SAP S/4HANA Migration Cockpit, SAP Data Services) and their requirements.
  
  By following these steps, you should be able to diagnose and resolve the error effectively.