hello good day everyone, i am quite new to simulink and currently i am creating an induction motor and controlling its speed for a project in school(simulation of an electric vehicle). I am having a wierd problem, i was able to get it working last night, i was able to set the speed and from the output you could see the controller was working, however in the morning i keep getting an error, Undefined function or variable 'Ts'. I have tried using a simout and constant to declare this variable. i'm a bit new. Any help would be greatly appreciated.Thank you in advance.