Hello Belal,
there are 2 main problesm I see. First, you were using a 3 level inverter, which requires 12 control signals while you were only generating 6. So the 3 level converter needs to be changed to a 2 level converter (or you need to change how you generate the control signals to provide 12). That will fix your port dimensions error. The next issue is that the you will need to convert your values to boolean so that everything is the same data type going into the mux (see image below). Alternatively, you could have your interpreted Matlab Fcn define it's outputs as booleans, right now they are treated as double.
The 2 level converter is the 'universal bridge' block with IGBT's selected.
Regards,
Joel
