Cannot Open any MLAPP with axes

I am on 2020b. I am making a MLAPP using App Designer. It works fine, but as soon as I add an axes to it (for plotting), then when I save the MLAPP I cannot reopen. I will get an error:

"Unrecognized method, property, or field 'DesignTimeProperties' for class 'matlab.graphics.axis.Axes'".

Even if I create a blank app and add nothing but an axes, once I save it I cannot reopen in App Designer because of this same error.

Answer 1

[Saurabh]

Hi @John Troutman,

Considering refering to the similar post that speaks about the same issue:

https://www.mathworks.com/matlabcentral/answers/653383-app-designer-matlab-2020b-does-not-open-mlapp-file

I hope this helps!

[John Troutman]

Hi Saurabh, I'm not sure who to contact at customer support to help me.

Answer 2

[Adam Danz]

This appears to be the same issue as in the thread Saurabh mentioned. If you want to try to fix this yourself I suggest you create a backup of your app file in case something goes wrong. Then follow the instructions by Benjamin in this specific comment: https://www.mathworks.com/matlabcentral/answers/653383-app-designer-matlab-2020b-does-not-open-mlapp-file#comment_1392652

Alternatively, contact tech support and include instructions how to reproduce the problem. After opening the link, go to Produce Usage > Errors or Performance Issues, and then fill in the form.