Problem with booleans

Hi

I keep running into the same problem with booleans in GameDraw.

I create a cube, then I cut out (subtract) using another smaller cube so I'm left with a cube with a rectangular dent (not through-and-through).

That works fine.

Now I want to cut out a shallow half cylinder from the result of the previous boolean operation.

So I take that result, create a thin cylinder and place it halfway into the newly created cube (from the first boolean). Then I tell GameDraw to subtract again. Now instead of a new result it creates a null-object (at (0,0,0)) and throws these errors:

transform.position assign attempt for 'door_cut' is not valid. Input position is { NaN, NaN, NaN }.

UnityEngine.Transform:set_position(Vector3)

GameDrawEditor.PivotManager:CenterObjectPivot(GameObject)

GameDrawEditor.BooleanEditor:drawBooleanOperations()

GameDrawEditor.GDEditor:DrawBooleanGUIWindow(Int32)

UnityEditor.DockArea:OnGUI()

UnityException: You can generate UVs only for meshes with vertices inited.

UnityEditor.Unwrapping.GeneratePerTriangleUV (UnityEngine.Mesh src, UnwrapParam settings)

UnityEditor.Unwrapping.GeneratePerTriangleUV (UnityEngine.Mesh src)

GameDrawEditor.BooleanEditor.drawBooleanOperations ()

GameDrawEditor.GDEditor.DrawBooleanGUIWindow (Int32 id)

UnityEngine.GUILayout+LayoutedWindow.DoWindow (Int32 windowID)

UnityEngine.GUI.CallWindowDelegate (UnityEngine.WindowFunction func, Int32 id, UnityEngine.GUISkin _skin, Int32 forceRect, Single width, Single height, UnityEngine.GUIStyle style)

UnityEditor.DockArea:OnGUI()