How To Fix DMCLG840 - No migration object selected, only subproject will be copied

SAP Error Message - Details

• Message type: E = Error

• Message class: DMCLG - DMC Tool Development

• Message number: 840

• Message text: No migration object selected, only subproject will be copied

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message DMCLG840 - No migration object selected, only subproject will be copied ?

  The SAP error message DMCLG840, which states "No migration object selected, only subproject will be copied," typically occurs during the migration process in SAP systems, particularly when using the Data Migration Cockpit or similar tools. This error indicates that the system did not find any migration objects to process, and as a result, it will only copy the subproject without any associated data.
  Cause:
  
  
  No Migration Objects Defined: The most common cause is that there are no migration objects defined or selected for the migration project. This could happen if the migration objects were not created or if they were not properly assigned to the project.
  
  
  Incorrect Project Configuration: The project configuration might be incomplete or incorrect, leading to the system not recognizing any migration objects.
  
  
  Selection Criteria: The selection criteria used to filter migration objects may not match any existing objects, resulting in none being selected.
  
  
  Authorization Issues: Lack of proper authorizations to view or select migration objects can also lead to this error.
  
  
  Solution:
  
  
  Check Migration Objects: Ensure that the migration objects are correctly defined in the migration project. You can do this by navigating to the relevant transaction or tool where migration objects are managed.
  
  
  Select Migration Objects: If migration objects exist but are not selected, make sure to select the appropriate migration objects for the project before executing the migration.
  
  
  Review Project Configuration: Verify the configuration of the migration project to ensure that it is set up correctly and that all necessary parameters are filled out.
  
  
  Adjust Selection Criteria: If you are using filters or selection criteria, review them to ensure they are not too restrictive and that they include the migration objects you intend to use.
  
  
  Check Authorizations: Ensure that you have the necessary authorizations to access and select migration objects. If not, contact your system administrator to grant the required permissions.
  
  
  Consult Documentation: Refer to the official SAP documentation or guides related to the Data Migration Cockpit or the specific migration tool you are using for additional troubleshooting steps.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Training and Resources: Consider reviewing training materials or resources related to data migration in SAP to better understand the process and common pitfalls.
  
  By following these steps, you should be able to resolve the DMCLG840 error and successfully proceed with your migration project.