Generator Design and Optimisation in FEMM 4.2 Using LUA Scripting

I built the model of a generator in FEMM using LUA scripting but currently I am getting almost 0 torque for my machine after putting a current density in each of the 3 phases. To meet the specification I need to get my rated torque value followed by optimising the machine in terms of torque and mass by changing variables such as slot depth, tooth width, height of the back iron and etc. PLEASE IF YOUR ARE EXPERIENCED IN MACHINES SUCH AS MOTORS AND GENERATORS PLUS OPTIMISATION AND KNOW HOW TO DO LUA SCRIPTING AND OCTAVEFEMM PLEASE GET IN TOUCH. I ALREADY HAVE WRITTEN THE CODE FOR MY MACHINE. IT IS 3 PHASE DISTRIBUTED AND ANOTHER MODEL IS 3 PHASE CONCENTRATED.