No value return From Callback function

[baderAmmoun]

I need to render the same figure instance in two different wx python frame . the second frame needs to render the figure when the user press the button and the first one render when I run the app . the problem is when I press the button to render the figure the callback function on the first figure does not return any thing any more even it is executed. the problem disappear if I use a different instance of the figure in two frames