help to resolve my this GUI code

btnNumber=11;
labelPos=[left+3*controlWidth+0.06 top-2*controlHeight controlWidth+0.08 controlHeight-0.005];
callbackStr='mainGUI(''Enhancement '');';
hdl.btn_enhance=uicontrol('Parent',figHandle,...
    'Style','pushbutton',...
    'Units','normalized',...
    'Position',labelPos,...
    'Horiz','left',...
    'String','Enhancement',...
    'FontSize',8,...
    'backgroundcolor',figBackColor,...
    'Callback',callbackStr,...
    'Interruptible','off');
This is the pushbutton function of enhancement of my Gui

enhImgPosition=[imgWidth+50+50-50,figPosition(4)-imgHeight-50,imgWidth,imgHeight];
enhImage=enhanceImage(orgImage);
set(hdl.figHandle_Axes3,'xlim',[.5, imgWidth+.5],'ylim',[.5 imgHeight+.5],'position',enhImgPosition);
set(get(hdl.figHandle_Axes1, 'Title'), 'String', 'Initial segmentation','visible','on');
set(hdl.enhImage, 'XData',[1 imgWidth],'YData',[1 imgHeight],'CData',enhImage);drawnow;
This  code for displaying enhancement result on Gui

function Enhancement()

global orgImage;
global enhImage;
global filename0;
global enhResultFilename;
global bwenhancementtResultImage;
enhImage=enhanceImage(orgImage);
cd('.\segmentation results\');
enhResultFilename=[filename0(1:end-4),'_enhancementResult','.bmp'];
[filename filepath]=uiputfile(segResultFilename,'Save enhancement result');
if filename(1) && ~isempty(bwenhancementtResultImage)    
    imwrite(enhImage,[filepath,filename]);
end
cd('..');
the enhanceImage(orgImage) is my m-file which I have create

But when clicking on the pushbutton I am getting followin error

??? Reference to non-existent field 'enhImage'.

Error in ==> mainGUI>LoadNewAVIFile at 326 set(hdl.enhImage, 'XData',[1 imgWidth],'YData',[1 imgHeight],'CData',enhImage);drawnow;

Error in ==> mainGUI>InitializeMSRMFig at 250 LoadNewAVIFile(figHandle);

Error in ==> mainGUI at 6 feval(action,varargin{:}); % call function

??? Invalid function name 'Enhancement '.

Error in ==> mainGUI at 6 feval(action,varargin{:}); % call function

??? Error while evaluating uicontrol Callback

>> why am i getting this error

Answer 1

[Sk Sahariyaz Zaman]

In deceleration also you need to write as "global enhImage;" then write - enhImage = enhanceImage(orgImage);

also see http://in.mathworks.com/help/matlab/ref/global.html

Hope this will solve your problem.