How To Fix CNV_DMC_MC_EXCEPTION188 - Source structure &1 of view &2 cannot be ôVisibleö; 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: 188

• Message text: Source structure &1 of view &2 cannot be ôVisibleö; see long text

What causes this issue?

For source structure &V1&, the view ?&V2&? is set to ?Visible?. This is
not possible as source structure &V1& has at least one parent structure
that is set to ?Not Visible? for this view. You need to ensure that the
view ?&V2&? is set to ?Not Visible? for all parent structures.

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 CNV_DMC_MC_EXCEPTION188 - Source structure &1 of view &2 cannot be ôVisibleö; see long text ?

  The SAP error message CNV_DMC_MC_EXCEPTION188 typically occurs in the context of data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC). This error indicates that a specific source structure cannot be made "visible" in the context of the data migration process. Here’s a breakdown of the potential causes, solutions, and related information:
  Causes:
  
  Incorrect Configuration: The source structure may not be properly configured in the migration project, leading to visibility issues.
  Missing or Incomplete Mapping: If the mapping between the source and target structures is incomplete or incorrect, the system may not be able to recognize the source structure.
  Data Model Issues: There may be issues with the underlying data model that prevent the structure from being visible.
  Authorization Issues: The user executing the migration may not have the necessary authorizations to access the source structure.
  Technical Issues: There could be technical issues or bugs in the DMC or the underlying SAP system.
  
  Solutions:
  
  Check Configuration: Review the configuration of the source structure in the migration project. Ensure that it is correctly defined and activated.
  Review Mapping: Verify that the mapping between the source and target structures is complete and correct. Make any necessary adjustments.
  Data Model Validation: Check the data model for any inconsistencies or issues that might prevent the source structure from being visible.
  User Authorizations: Ensure that the user has the necessary authorizations to access the source structure. You may need to consult with your SAP security team.
  Consult Long Text: The error message suggests checking the long text for more details. Use transaction codes like SE91 to view the long text associated with the error message for additional context.
  SAP Notes and Support: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error. There may be patches or updates available that resolve the issue.
  Debugging: If you have access to development tools, consider debugging the process to identify the exact point of failure.
  
  Related Information:
  
  SAP Data Migration Cockpit (DMC): Familiarize yourself with the DMC and its functionalities, as understanding how it works can help in troubleshooting.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they found effective.
  Documentation: Review the official SAP documentation related to data migration and the specific structures you are working with.
  
  If the issue persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.