S-function axes reset issue.

Hi,

I have a S-function block written in Matlab level1. The block has codes to animate my simulink model. I have created a uicontrol push-button that calls a clear function in order to clear all my graphics and reset the animation to start again again from initialize values. However, when I press the button, all what I get is a quick clearing and then the animation objects continue from the same point where they cleared at. Could anyone help with this. Thanks!

 Please see below: my uicontrol and clear function codes:

1-Uicontrol in the initialization function (mdlInitializeSizes):

 uicontrol('Parent',Main,...

            'Style','pushbutton'...

             %etc,...%

            'Callback',@(src,evt) reset);

2- The clear function:

function reset (src,evt);

cla

clear all