Cannot process a message from a window that is not a multiple document interface (MDI) window.

Details
Product: Windows Operating System
Event ID: 1445
Source: Kernel
Version: 5.0
Component: System Resources
Symbolic Name: ERROR_NON_MDICHILD_WINDOW
Message: Cannot process a message from a window that is not a multiple document interface (MDI) window.
   
Explanation

An application, as part of its user interface, has operated on a window that is part of an MDI window set.

   
User Action

Contact the supplier of the running application.

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