How To Fix DMC_GENERAL390 - Cannot copy migration object; rule &1 has been changed

SAP Error Message - Details

• Message type: E = Error

• Message class: DMC_GENERAL - MWB: General Messages

• Message number: 390

• Message text: Cannot copy migration object; rule &1 has been changed

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMC_GENERAL390 - Cannot copy migration object; rule &1 has been changed ?

  The SAP error message DMC_GENERAL390 indicates that there is an issue with copying a migration object due to changes made to a specific rule. This error typically occurs in the context of data migration projects, particularly when using the SAP Data Migration Cockpit or similar tools.
  Cause:
  The error is triggered when the migration object you are trying to copy has a rule (denoted as &1 in the error message) that has been modified since the last time the object was copied. This could happen due to:
  
  Changes in the Migration Rules: If the rules governing the migration object have been altered, the system prevents copying to ensure data integrity and consistency.
  Concurrent Modifications: If multiple users are working on the same migration object or rules, one user’s changes may conflict with another’s actions.
  Version Control Issues: If the migration object is version-controlled, changes to the rules may not be compatible with the version you are trying to copy.
  
  Solution:
  To resolve the error, you can take the following steps:
  
  Review Changes: Check the migration rules associated with the migration object. Identify what changes have been made to the rule that is causing the error.
  Revert Changes: If possible, revert the changes made to the rule to the previous state and try copying the migration object again.
  Update the Migration Object: If the changes to the rule are necessary, update the migration object to align with the new rules. This may involve modifying the object to accommodate the changes.
  Check for Locks: Ensure that no other users are currently editing the same migration object or rules. If there are locks, coordinate with the other users to resolve them.
  Consult Documentation: Refer to SAP documentation or notes related to the Data Migration Cockpit for any specific guidelines or updates regarding this error.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to the Data Migration Cockpit and this specific error message.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTMC (for the Migration Cockpit) to manage migration objects and rules.
  Testing: After making changes, conduct thorough testing to ensure that the migration object works as expected with the updated rules.
  
  If the issue persists after trying the above solutions, consider reaching out to SAP support for further assistance, providing them with detailed information about the error and the steps you have already taken.