How To Fix CNV_DMC_MC090 - The top level of the object list is already being displayed

CNV_DMC_MC090 - Overview

• Message type: E = Error

• Message class: CNV_DMC_MC - Migration Object Modeler

• Message number: 090

• Message text: The top level of the object list is already being displayed

Self-Explanatory Message

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CNV_DMC_MC090 - Details

• The SAP error message CNV_DMC_MC090 typically occurs in the context of data migration or conversion processes, particularly when using the SAP Data Migration Cockpit (DMC) or related tools. This error indicates that the system is trying to display or process an object list that is already being displayed, which can lead to conflicts or inconsistencies in the user interface.
  
  Cause:
  
  Concurrent Operations: The error often arises when a user attempts to open or display an object list that is already open in another session or window.
  Session Management: If multiple sessions are trying to access the same object list, it can lead to this error.
  User Interface Issues: Sometimes, the user interface may not refresh properly, leading to the system thinking that the object list is still being displayed.
  
  
  Solution:
  
  Close Duplicate Sessions: Check if there are multiple sessions or windows open that are trying to access the same object list. Close any duplicates.
  Refresh the Interface: