How To Fix MDG_MDF123 - An error occurred during the generation; see the log

SAP Error Message - Details

• Message type: E = Error

• Message class: MDG_MDF - Master Data: Messages

• Message number: 123

• Message text: An error occurred during the generation; see the log

What causes this issue?

An error occurred while generating the Data Dictionary.
For more detail, see the <DS:TRAN.MDG_GN_LOG>Generation Log</>.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MDG_MDF123 - An error occurred during the generation; see the log ?

  The SAP error message MDG_MDF123 typically indicates that there was an issue during the generation process in the Master Data Governance (MDG) framework. This error can occur in various contexts, such as when creating or updating master data objects.
  Cause:
  The error message suggests that there was a problem during the generation of a specific object or process. Common causes for this error include:
  
  Configuration Issues: Incorrect or incomplete configuration settings in the MDG system.
  Data Issues: Invalid or inconsistent data being processed, which may violate business rules or data validation checks.
  Authorization Problems: The user may not have the necessary authorizations to perform the action.
  Technical Errors: Issues in the underlying ABAP code or database problems that prevent the generation process from completing successfully.
  Log Files: The error message suggests checking the logs for more detailed information, which can provide insights into the specific cause of the error.
  
  Solution:
  To resolve the MDG_MDF123 error, you can follow these steps:
  
  
  Check the Logs: 
  
  Access the application log (transaction SLG1) or the MDG logs to find more detailed error messages that can help identify the root cause.
  Look for specific error codes or messages that can guide you to the exact issue.
  
  
  
  Review Configuration:
  
  Ensure that all necessary configurations for the MDG process you are trying to execute are correctly set up.
  Check the relevant customizing settings in the MDG application.
  
  
  
  Validate Data:
  
  Review the data being processed to ensure it meets all required formats and business rules.
  Correct any inconsistencies or invalid entries.
  
  
  
  Check Authorizations:
  
  Verify that the user executing the process has the necessary authorizations to perform the action.
  If needed, consult with your security team to adjust roles and permissions.
  
  
  
  Technical Support:
  
  If the issue persists, consider reaching out to your SAP support team or consulting SAP Notes for any known issues related to the error.
  You may also want to check for any relevant SAP Notes or patches that address this specific error.
  
  
  
  Testing:
  
  After making changes, test the process again to ensure that the error has been resolved.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may provide additional insights or solutions for the MDG_MDF123 error.
  Documentation: Review the official SAP documentation for Master Data Governance to understand the expected configurations and processes.
  Community Forums: Engage with SAP community forums or user groups where similar issues may have been discussed.
  
  By following these steps, you should be able to diagnose and resolve the MDG_MDF123 error effectively.