hi burhan.. i ii totatlly agree with you.. but my mean to say was can we change teh struct of input output strcut.. as we all know that matlab work on matrix structure..i an guess that outport of the matlab componet give result in 1×1 structure .. event in documentation in the matlab co simulation they had pointed about array structure .. even whn to write OutPort1= InputPort1: in matlab i starting creating a structure …do we have any option to define it according to our requirement