How can i solve this error "Error while evaluating uicontrol Callback"?

Hello, I'm new to Matlab interface and syntax. Currently i'm working on mt final year project. Fingerprint Classification using Support Vector Machine. Now, I'm are in image processing phase. I'm having problem to display the binarized image in my GUI. Below show the GUI of my experiment. when I clicked the binarization button, the binary image did not display in as stated. It supposed to display in Axes2.

here, I include the code that I have so far. Please someone solve my problem. :(

[Varun Pai]

The possibilities of such a error can be: (1) You might be using a cleared variable inside that function or (2) You might not have put guidata(hObject,handles) at the end of each gui function