How To Fix CNV_DMC_MC_EXCEPTION200 - Cannot open structure mapping preview; see long text

SAP Error Message - Details

• Message type: E = Error

• Message class: CNV_DMC_MC_EXCEPTION - Exception texts of Migration Object Modeller

• Message number: 200

• Message text: Cannot open structure mapping preview; see long text

What causes this issue?

For this migration object, the runtime object cannot be generated as
runtime object generation errors exist. Such errors can occur, for
example, if the target structure is not mapped to any source structure.
In order to open the structure mapping preview, the runtime object must
be generated for the migration object.
To open the structure mapping preview, resolve the errors and choose the
?View Structure Mapping? button again.

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

System Response

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 CNV_DMC_MC_EXCEPTION200 - Cannot open structure mapping preview; see long text ?

  The SAP error message CNV_DMC_MC_EXCEPTION200 with the description "Cannot open structure mapping preview; see long text" typically occurs in the context of data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or similar tools.
  Cause:
  This error can arise due to several reasons, including:
  
  Missing or Incomplete Configuration: The structure mapping may not be properly configured or may be missing required fields.
  Authorization Issues: The user may not have the necessary authorizations to access the structure mapping preview.
  Technical Issues: There could be underlying technical issues, such as problems with the database connection or inconsistencies in the data model.
  System Bugs: There may be bugs or issues in the specific version of the SAP software being used.
  
  Solution:
  To resolve the error, you can try the following steps:
  
  
  Check Configuration:
  
  Ensure that the structure mapping is correctly configured. Review the mapping settings and ensure all required fields are included.
  
  
  
  Review Authorizations:
  
  Verify that the user has the necessary authorizations to access the structure mapping preview. You may need to consult with your SAP security team to ensure proper roles and permissions are assigned.
  
  
  
  Check Logs:
  
  Look at the application logs (transaction SLG1) for more detailed error messages that can provide additional context about the issue.
  
  
  
  Database Connection:
  
  Ensure that the database connection is stable and that there are no connectivity issues. You can test the connection using transaction DBACOCKPIT or similar tools.
  
  
  
  Update SAP Software:
  
  If you suspect a bug, check for any available updates or patches for your SAP system. Applying the latest support packages or notes may resolve the issue.
  
  
  
  Consult SAP Notes:
  
  Search the SAP Support Portal for any relevant SAP Notes that may address this specific error message. There may be known issues and recommended solutions.
  
  
  
  Contact SAP Support:
  
  If the issue persists after trying the above steps, consider reaching out to SAP Support for further assistance. Provide them with detailed information about the error, including any logs or screenshots.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as LTMC (for the Migration Cockpit) and SLG1 (for application logs).
  Documentation: Review the official SAP documentation for the Data Migration Cockpit and related tools to ensure you are following best practices.
  Community Forums: Check SAP Community forums or other user groups for discussions related to this error, as other users may have encountered and resolved similar issues.
  
  By following these steps, you should be able to diagnose and resolve the CNV_DMC_MC_EXCEPTION200 error effectively.