App designer (Matlab 2018a) does not open *.mlapp file anymore

Yesterday I created an app with the app desiner (matlab 2018a) tool. Unfortunately, when I tried to open the app today to edit the code further, I got the follwoing message: "Value muse be either: a vector of type single or double in the range [0 1] a vector of an integer of ligical type". If I double-click on the *.mlapp file, the app opens and work fine. However, I can't edit the code any further. What can I do to fix this problem?

Thank you for your help!

Answer 1

[PIYUSH AGGARWAL]

Try

edit *.mlapp on command line

[Valentin Jossen]

Thank you so much for the tip. Unfortunately the same message still appears.

[PIYUSH AGGARWAL]

Hi Valentin Jossen,

Your problem seems to be an unusual one. I tried reproducing the issue but was not able to. In my case it's working fine. However it might be that some of the files in your App Designer toolbox got corrupted. Clean Reinstallation might be a way to resolve your issue. If this not works try contacting MathWorks Support for expert assistance.

Have a Great Day,

Regards,

Piyush

[Valentin Jossen]

Many thanks for your help!

Answer 2

[Sjouke Rinsma]

Actually, I'm having a similar issue right now. Been working on an app for weeks now, and suddenly I am not able to open it anymore, just shows the error message "Struct contents reference from a non-struct array object". No problems opening any other apps though.

Real nice that appdesigner works with this 'shell' around it which I guess should provide more robust / less error-prone coding... but it also shields me from the source code which I now cannot view anymore (at least not in understandable code). Remember never having had such issues with guide.

[Walter Roberson]

if I recall correctly, you can unzip the mlapp and examine the files.