MATLAB: Do I receive a “cleanUp” error when I load application data that was saved in a later version of MATLAB

MATLAB

My GUI uses the GETAPPDATA function to "export" the GUI's application data as a structure, and then saves this structure in a MAT-file. If I do this in MATLAB 7.5 (R2007b), and reopen the GUI in MATLAB 7.4 (R2007a) –which causes the opposite process to occur–I receive the following error:

 ??? Error using ==> load
 Unable to find function cleanUp within C:\Program Files\MATLAB\R2007a\toolbox\matlab\graphics\openfig.m.

Best Answer

GUIDE maintains some application data for its own purposes. For example, the "handles" structure is saved in the figure's application data.

Sometimes, GUIDE stores as application data items that are not compatible with previous versions. The 'Listener' application data is an example of this.

Saving only the application data that you have added will likely resolve this issue.

Related Solutions

MATLAB: Is the GUI not able to execute when the FIG- and MATLAB files are placed in a ‘private’ directory, or a directory name starting with ‘@’ in MATLAB 6.5 (R13) and later versions

This is a limitation of MATLAB.

Due to changes in the architecture of MATLAB 6.5 (R13), full path information for the GUI is not available now due to a change in the built-in 'mfilename' function. Thus, HGLOAD is unable to find the FIG-file associated with the GUI.

With the current implementation of GUIDE, GUI's in a private directory, or a directory starting with '@' do not work properly even if the full path information is used. This is due to the fact that MATLAB files under a private directory can only be seen by MATLAB code in function files immediately above the private directory. Callbacks, including CreateFcn, of the GUI do not work properly both in startup and when running.

To work around this issue, place the MATLAB file and the FIG file in a directory that is on your MATLAB path. For user defined classes, the MATLAB file and FIG-file need to be placed in the parent directory of the class.

MATLAB: Is there a cleanup or finally type construct in the MATLAB language for end of function clean up

There is no destructor or finally keyword or construct in MATLAB for cleaning up an end of function.

In order to do this there is a function available in MATLAB 7.6(R2008a) named ONCLEANUP. This function can be used to cleanup tasks at function completion.

There is also an ability within the MATLAB Object System to have a destructor as is illustrated in the following code segment.

% myClass.m 
classdef myClass < handle 
      properties 
          a 
      end 
      methods 
          function obj = myClass(a)
             obj.a = a;
          end
          function delete(obj) 
              disp('Getting deleted');
          end
      end 
end 
% end of class

This would allow the user to call a delete function and "cleanup" any rogue variables.

Best Answer

Related Solutions

MATLAB: Is the GUI not able to execute when the FIG- and MATLAB files are placed in a ‘private’ directory, or a directory name starting with ‘@’ in MATLAB 6.5 (R13) and later versions

MATLAB: Is there a cleanup or finally type construct in the MATLAB language for end of function clean up

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