Only one part can be analyzed. Multiple parts on the build plate are not allowed.
For printers with multiple extruders, only the 1st extruder is supported by Smart Slice. Make sure that extruder 1 is assigned to the model.
Only flat surfaces and cylinders can be selected for forces and anchors.
Supported Infill Pattern types are grid, triangles, and cubic. If Infill Density = 100%, Cura will set Top Layers = 0 and Bottom Layers = 999,999 which results in a part composed of only walls and layers. This scenario is supported by Smart Slice.