could anyone confirm that the SLAB_TOP_SURF global variable doesn't return with any value. Same experience i have with SLAB_VOLUME.
I've created a label which calculates and shows the result of an attached slab on the floorplan. I used this object in AC9 and that works fine there. In AC11 it doesn't show the values. I tried to debug it with print and the perimeter for example works fine.