Need help on Control System Tuner in Simulink

I tried to use control system tuner to tune my PID controllers, but when I was setting step tracking goal, my step input signals do not show up:

How should I fix this issue? I've attached my complete simulink model here. Thank you for the help in advance

Answer 1

[Jorge Ignacio Cisneros Saldana]

I have similar issue with you. I am trying to tune voltage and curent conrol loops for Inverter. Also my input signal does not show up. Once i select it mentions error Nan