Nothing is showing at 3D view after creating roof structures with roof wizard. All the elements and objects including the roof structures can still be selected only by ''select all'' and I can see the selected number of elements but only one gripping point which can't be gripped tho... Everything can also be seen in 2D (floorplans, sections and facades). Even the roof structures can be seen in facades if needed.
When the exact layer for roof structures is closed I can find my 3D view through created 3D scenes but when layer is activated it all disappears again. I also tried this with completely new project and only with created roof, and it is the same problem.