Which outport of stateflow block will provide the proper output data?

Using runtime object I found that for "sldemo_autotrans" model there are four OutputPorts.

But the correct output is obtained in the OutputPort(2).

Similarly,for "sldemo_fuelsys", model there are ten OutputPorts,the correct output is obtained in OutputPort(4).

Is there any provision in MATLAB to find the proper OutputPorts of a stateflow chart which would provide the exact answer as of stateflow chart?Because OutputPorts other than 2 and 4 in the above cases are providing answers but are not the same as of stateflow output which I verified using signal logging.

Answer 1

[Jerbin J]

open_system(modelName);
sf=sfroot;
chart=sf.find('-isa','Stateflow.Chart');
data=Stateflow.Data(ch);
data.Scope='Output';
% Port which provides correct output data
reqOpPort = data.Port