Hi Lars
I did a quick check the active layer is on. I tried uninstalling CadTools and downloading and reinstalling the latest vision.
I have infrastructure design suite installed 2015. I tried running in AutoCAD , civil 3d and civil 3d running as AutoCAD.
I have the same result. No current drawing. I have been using other functions like bank ticks and other polyline and line and text commands and these all work fine. only the slope mode commands don't work.
Noel