Unhandled exception.

Have no Idea what cause this message but it appears quite a lot.
Check this video at 0.38 I did nothing special just wanted to select object.
It continue to appears when I wanted select objects after I finish record video.



See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at DigitalFossil.AnimationDesign.AnimationDesignGraphicWindow.ModelDesigner.SelectVertexAtPoint(Point pt, MouseEventArgs me)
   at DigitalFossil.AnimationDesign.AnimationDesignGraphicWindow.ModelDesigner.OnMouseUpMainInner(Boolean& clearSubobjectPathSelectionModeNeeded, Object sender, MouseEventArgs e)
   at DigitalFossil.AnimationDesign.AnimationDesignGraphicWindow.ModelDesigner.OnMouseUpMain(Object sender, MouseEventArgs e)
   at DigitalFossil.AnimationDesign.AnimationDesignGraphicWindow.ModelDesigner.OnMouseUp(Object sender, MouseEventArgs e)
   at DigitalFossil.AnimationDesign.AnimationDesignGraphicWindow.OnMouseUp(Object sender, MouseEventArgs e)
   at DigitalFossil.AbstractGraphicWindow.CursorClerk.OnMouseUp(Object sender, MouseEventArgs e)
   at System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
   at System.Windows.Forms.Control.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5456 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework64/v2.0.50727/mscorlib.dll
----------------------------------------
NVil 1.0
    Assembly Version: 2.3.5479.19383
    Win32 Version: 2.3.5479.19383
    CodeBase: file:///C:/Program%20Files/NVil/NVil%201.0.exe
----------------------------------------
WorkShop
    Assembly Version: 2.3.5479.19376
    Win32 Version: 2.3.5479.19376
    CodeBase: file:///C:/Program%20Files/NVil/WorkShop.DLL
----------------------------------------
BasicD3DClasses
    Assembly Version: 2.3.5479.19372
    Win32 Version: 2.3.5479.19372
    CodeBase: file:///C:/Program%20Files/NVil/BasicD3DClasses.DLL
----------------------------------------
CharacterClasses
    Assembly Version: 2.3.5479.19370
    Win32 Version: 2.3.5479.19370
    CodeBase: file:///C:/Program%20Files/NVil/CharacterClasses.DLL
----------------------------------------
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5456 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5456 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5458 (Win7SP1GDR.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
System.Data
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.5420 (Win7SP1.050727-5400)
    CodeBase: file:///C:/Windows/assembly/GAC_64/System.Data/2.0.0.0__b77a5c561934e089/System.Data.dll
----------------------------------------
System.Xml
    Assembly Version: 2.0.0.0

Where is the video link?

Sorry,
https://www.youtube.com/watch?v=E-zuOTQuetA&feature=youtu.be

Does it only happen when you are doing the importing from keyshot?

IStonia, do not know it for sure looks like this exception has random appearance.
I'll experiment with it a bit more may be this exception cause my plugin I have to experiment a bit more to say it for sure.

Fixed.