Well, I use A7.80 but I don't think it matters...
But now that you've mentioned it, it hits me that it does need some configuration in the build process.
In my first try, I have the same problem(I guess so) that the invisible block wasn't detected even by c_move...
But then I tried this build setting:
- Invisible==None->ON
- Create meshes ->ON
Other setting doesn't matter I guess...

Hope it helps