How To Fix SDMI120 - Migration class &1 already registered for software component &2

SAP Error Message - Details

• Message type: E = Error

• Message class: SDMI - Messages of SDMI

• Message number: 120

• Message text: Migration class &1 already registered for software component &2

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.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SDMI120 - Migration class &1 already registered for software component &2 ?

  The SAP error message SDMI120 indicates that there is an issue with the migration class already being registered for a specific software component. This typically occurs during the migration or upgrade process when the system detects that a migration class has already been registered, which can lead to conflicts or inconsistencies.
  Cause:
  
  Duplicate Registration: The migration class specified in the error message has already been registered for the software component mentioned. This can happen if the migration process was attempted multiple times or if there was an incomplete previous migration.
  System Configuration Issues: There may be inconsistencies in the system configuration or metadata that lead to the registration being recognized multiple times.
  Incorrect Migration Steps: If the migration steps were not followed correctly, it could lead to this error.
  
  Solution:
  
  
  Check Existing Registrations: 
  
  Use transaction codes like SE11 (Data Dictionary) or SE80 (Object Navigator) to check if the migration class is already registered. Look for entries related to the software component in question.
  
  
  
  Remove Duplicate Entries:
  
  If you find that the migration class is indeed registered, you may need to remove the duplicate entry. This can often be done through the relevant transaction or by using specific SAP tools designed for managing migration classes.
  
  
  
  Review Migration Documentation:
  
  Ensure that you are following the correct migration steps as outlined in the SAP documentation. This may include prerequisites that need to be fulfilled before registering a migration class.
  
  
  
  Consult SAP Notes:
  
  Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates that resolve known issues related to migration classes.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP Support for assistance. Provide them with the error message details and any steps you have already taken.
  
  
  
  Related Information:
  
  SAP Migration Tools: Familiarize yourself with the tools and transactions used for migration in SAP, such as the Software Update Manager (SUM) or the Maintenance Planner.
  System Logs: Check system logs (transaction SLG1) for any additional error messages or warnings that may provide more context about the issue.
  Version Compatibility: Ensure that the software components and migration classes you are working with are compatible with your current SAP version.
  
  By following these steps, you should be able to identify the cause of the SDMI120 error and implement a solution to resolve it.