Mysterious GUI error messages

All you GUI experts -

I have built a GUI using GUIDE to perform all the function layouts (it's all buttons and text entry windows) and added the functionality I want in the function callbacks of the .m file. As I code improvements I tend to save the new GUI .m file under a new name so I can retain previous iterations of the GUI should I want to revisit them. The original file name was ClusterGUI, and I have gone through several iterations and the current one is ClusterGUI4. When I call ClusterGUI4 or initiate it from GUIDE, I get the following red lines of death:

??? Undefined function or method 'ClusterGUI' for input arguments of type 'char'.

Error in ==> @(hObject,eventdata)ClusterGUI('figure1_CreateFcn',hObject,eventdata,guidata(hObject))

??? Error using ==> struct2handle
Error while evaluating figure CreateFcn

The GUI runs anyway, but I've never been able to get rid of this.

Answer 1

[Walter Roberson]

You need to go through the Property Inspector to find the Callback property that mentions ClusterGUI

You could probably also do it mechanically,

badcallbacks = findall(0,'-regexp','callback','ClusterGUI[^4]');

[Jason]

Walter -

I tried the mechanical approach, and saw this:

>> badcallbacks = findall(0,'-regexp','callback','ClusterGUI4');

Warning: Regular expression comparison is not supported for the CallbackObject property: using ordinary comparison.

> In findobjhelper at 63

In findobj at 45

In findall at 29

>> badcallbacks = findall(0,'-regexp','callback','ClusterGUI');

Warning: Regular expression comparison is not supported for the CallbackObject property: using ordinary comparison.

> In findobjhelper at 63

In findobj at 45

In findall at 29

I'll try the hunt-and-peck method with the property inspector and see what I can find.

[Jason]

That fixed it! I found an old filename buried somewhere it shouldn't have been.

[David (degtusmc)]

Walter,

I am having the exact same problem that Jason was having. I tried going through the Property Inspector, but I could not find anything referring to the old GUI.

When I tried the mechanical approach I get the following:

Warning: Regular expression comparison is not supported for the 'CallbackObject' property: using ordinary comparison. 
> In C:\Program Files\MATLAB\R2011b\toolbox\matlab\graphics\private\findobjhelper.p>findobjhelper at 31
  In findobj at 45
  In C:\Program Files\MATLAB\R2011b\toolbox\matlab\graphics\findall.p>findall at 38

How do I interpret the result? Also, just to be clear; you are suppose to type the "findall" command in the command window under the folder where the GUI is located, right?

Thank you for your time.

Answer 2

[Tigersnooze]

This may be a dumb question, but are you also saving the new figure as 'ClusterGUI4.fig', or as applicable?

[Jason]

Not a dumb question at all, and yes I am. The name ClusterGUI does not appear anywhere in the newer ClusterGUI4 file - all instances of the name in the file itself are ClusterGUI4.

Answer 3

[Image Analyst]

HOW did you save the new GUI? It's kind of particular how you do it. You can't just make copies in your operating system and rename them to the new name - never do that. It looks like you probably did this. The best way to create a new app based on an old one is to not to do anything in the operating system, and instead to open the original fig file in GUIDE and then do a "save as" your new app name ClusterGUI4.fig. This will then automatically create a ClusterGUI4.m file, and then all the obscure references in Property Inspector and the m file should be consistent and working fine.

[Jason]

I did it the second way you describe, by saving it in MATLAB with a "save as" command. The problem was that the grid outlay that I originally defined in ClusterGUI retained the original name in its 'Name' property even when the new GUI was saved under a new name. Once I found and corrected that the red death error lines disappeared.

[Image Analyst]

What is a grid outlay? Do you mean the grid control, like the table widget?

[Jason]

Not sure what you'd call it, but when a brand-new figure is created in GUIDE, the first thing that appears is a grid upon which all other GUI elements are placed. That object still had the name of the first iteration of my GUI, and once that was renamed the annoying error message disappeared. In the object browser it's at the top of the list as figure(ClusterGUI4).

[Image Analyst]

That is the actual figure itself, which is basically the background upon which you place all controls (such as axes, buttons, sliders, etc.). It has a "Name" property, which is what shows up in the title bar, and a "tag" property which is really the important property and is what it's called by when you look at the handles structure.