Why is simulink model called with an invalid flag?

I made a simulink model with four variables in it.

The code

var1 = 0.14
var2 = 0.35
var3 = 1000000
var4 = 1000
I = sim('modelname.slx')

works properly, but when I wrap this up in the function like

function I = mdlname(var1, var2, var3, var4)
    I = sim('modelname.slx')
end

mdlname(0.14, 0.35, 1000000, 1000)

It says that the model was called with an invalid flag.

Why is this happening?

Answer 1

[stozaki]

Hello Seunguk,

If you call a function, you need to use variables in the function workspace.

ret = mdlname(0.14, 0.35, 1000000, 1000);

function I = mdlname(var1, var2, var3, var4) %#ok<INUSD>
    I = sim('modelname.slx','SrcWorkspace','current');
end

document : Input Arguments section of sim.

Regards,

stozaki

[Seunguk Lee]

Problem solved. Thanks a lot stozaki!