how to resolve the 'dot indexing not supported for variables of this type' error?

I am using Matalb 2019b. I have a guide figure that I when I save it I get the error as below. The guide figure has been used at lot but since upgrading I now get the error. I can edit and update the associated .m file with no probelms.

The lines of code in the guidefunc are as follows:

layout_ed = getappdata(fig, 'GUIDELayoutEditor');
frame = layout_ed.getFrame;

Any suggestions will be most appreciated

[Darren Akehurst]

I should note all I had added was a simple radio button. The issue seems to be more an issue of saving a guide fig with the new version. It is a signicant appl which would take huge effort to upgrade to the new apps

[Walter Roberson]

Would you feel comfortable attaching the .fig and .m files for debugging?

[Darren Akehurst]

It has a lot of information II would prefer to keep private. Any suggestions on how to approach the issue would be really appreciated though

[Walter Roberson]

It needs a long debugging session. You have to trace the readSavedFigure call: the first parameter to it should be a non-empty layout editor object that would then get stored into the GUIDELayoutEditor property of the figure within the newGuideFig function near line 2368. You need to figure out whether a valid value is getting set there; if not then you would need to trace back to find out what is calling guidefunc with incorrect parameters or where the value is disappearing to. If a valid value is getting set, then it becomes a matter of tracking down why the value is disappearing.

Answer 1

[per isakson]

"I would prefer to keep private" Two alternatives remain

• Make a Minimal working example and upload it here
• Start debugging. Set a breakpoint at the line 1224. Invoke your code. When the execution halts at 1224 inspect the values of fig and layout_ed. Share your findings here. See Walter's comment.

And see

• Debug a MATLAB Program and
• Examine Values While Debugging

[Olatunji Omisore]

Hi, I had similar problem and have to start the GUI from fresh each time. Kindly find my files for assisstnace and hope ypu can guide me to what is causing this problem.

Thanks.

Answer 2

[JuanRDevelops]

A solution I gathered from another question. This worked for me

For your GUI, you should have script.fig and script.m files

Rename script.m to something like script_.m

Work on your figure with GUIDE, and then save it. Rename your m-file to script.m again.

https://www.mathworks.com/matlabcentral/answers/75869-error-in-gui-attempt-to-reference-field-of-non-structure-array