how to identify the handle for setappdata and getappdata?

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mohanish il 17 Ott 2018

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https://it.mathworks.com/matlabcentral/answers/424598-how-to-identify-the-handle-for-setappdata-and-getappdata

I am writing a code where i want to use the data from my main Gui into my second Gui. I am saving that data in main gui using setappdata. when i am trying to retrieve that data in my second gui using getappdata, I am getting an error as handle is undefined.