.NET Framework error when I mouse over a newly opened file with OR cross sections

This error had already been mentioned in another thread, but I'm creating a new thread because the mention of this error had been a departure from the original post in that thread. With the help and gracious patience of Phil Chuinard, Jan Slegr, and Reginald Wallace, I was able to get rid of it temporarily. 

I'm using Microstation SS3 8.11.09.608 and GEOPAK SS3 .722.

A short review:

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
at Bentley.Civil.Objects.UI.Coordinates.CoordinatesManager.ConstructSmartPoint(DPoint3d coordinates, SnapDescriptor snapDescriptor, DynamicCrossSectionSpace space, ObjectKey key)
at Bentley.Civil.Objects.UI.Coordinates.CoordinatesManager.ConstructSmartPoint(DPoint3d coordinates, SnapDescriptor snapDescriptor, IViewport viewport, ObjectKey key) 
at Bentley.Civil.Objects.UI.Coordinates.CoordinatesManager.ApplyConstraint(DPoint3d coordinates, SnapDescriptor snapDescriptor, IViewport viewport)
at Bentley.Civil.Objects.UI.Coordinates.CoordinatesManager.OnFixPoint(IEditableButtonEvent cursorEvent)
at Bentley.Civil.CadSystem.Microstation.MstnInputManager.OnPointFilterEvent(_dPoint3d* ptP, Int32 viewIndex, Int32 eventType) 
at Bentley.Civil.CadSystem.Microstation.?A0x62071685.inqmn_PointFilterFunction(_dPoint3d* ptP, Int32 viewIndex, Int32 eventType)
at Bentley.Internal.MicroStation.CoreHook.DispatchNoHandler(UInt32* argStack, UInt32 mysp, IntPtr pFunc) 
at Bentley.Internal.MicroStation.CoreHook.Dispatch(UInt32* argStack, UInt32 mysp, IntPtr pFunc)

5141.msdebug.txt

7217.exception.log

The problem occurs when I've just opened a file with an open cross section view. It occurs only when I mouse over that window. A workaround is that I can turn off the view and turn it back on and it works fine.

I repaired the .NET Framework installation.

It was fixed almost exactly a week earlier (maybe it's on a 7-day periodic return) by removing two cfg files from the loading process, loading Microstation, then returning them to the process. Those two files were descartes.cfg and geopak.3.0.cfg.

Update:

In today's case, I turned off only the geopak.3.0.cfg and left descartes.cfg active and it worked.

To be more precise, doing this disabled the window that the cross section view was in. After I closed the program, re-activated geopak, then turned on that window, I closed the program once more. When I opened it, I half-expected the .NET Framework error to be raised again but it didn't.

Any advice on ridding myself of this for good?