I think there is a little bug. We adjust the depth of the frame to the thickness of the wall. When we close et reopen the rhino-file, this value is set to -∞ and the frame disappear in the drawing.
Hi Simon, we have seen this error in previous versions of VisualARQ. It should be fixed in the current version 2.12.6. Please install it and let me know if the problem persists.