Failed Model-Converted Living Space Boundaries

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I received the following message when building a model. I dragged a Finished Attic over a previous Living Space in the GUI to trigger this result. Model included here. I repeated the error, but the second time by extending the 1st floor living space, rather than converting the space type.

Message:
The following application error has occurred in BEopt v3.0.0.0.  Please report this to the BEopt development team and restart the application.

Destination array was not long enough. Check destIndex and length, and the array's lower bounds.

Stack Trace:
at System.Array.Copy(Array sourceArray, Int32 sourceIndex, Array destinationArray, Int32 destinationIndex, Int32 length, Boolean reliable)
at System.Array.Copy(Array sourceArray, Array destinationArray, Int32 length)
at NREL.BEopt.ObjLibVB.DrawingGeometry.RenderObject_WallCutOffAtLevelHeight(Surface& WallSurface, Single& LevelHeight) in C:\git\beopt\Source\BEoptObjLibVB\Rendering\dwgGeo_Render.vb:line 4513
at NREL.BEopt.ObjLibVB.DrawingGeometry.RenderObject_RoofCutOffAtticWalls() in C:\git\beopt\Source\BEoptObjLibVB\Rendering\dwgGeo_Render.vb:line 4428
at NREL.BEopt.ObjLibVB.DrawingGeometry.RenderObject_Create(Boolean RenderObject, Boolean UpdateVisibleCategories) in C:\git\beopt\Source\BEoptObjLibVB\Rendering\dwgGeo_Render.vb:line 68
at NREL.BEopt.BEoptUIVB.Drawing.Draw() in C:\git\beopt\Source\BEopt\Drawing\Drawing.vb:line 214
at NREL.BEopt.BEoptUIVB.Drawing.OnMouseUp(MouseEventArgs e) in 
 C:\git\beopt\Source\BEopt\Drawing\Drawing.vb:line 199

Thanks