Saving Appdesigner: Expected "appdesign​er.interna​l.codegene​ration.mod​el.CodeDat​a"

Hi all, Can somebody help me? I Have tried to Run a App or save it but it is imposible to do nothing. All code appear be ok, but the problem still, It is weird because if I click in the App directly is all run well but through the appdesigner give me this error I Can't continue development my app.

Thanks!.

[Florian]

Same issue here. It seems to be a problem to open R2016b *.mlapp with R2017b... No one knows a solution?

Answer 1

[Florian]

Re-install Matlab worked for me!

[Mara Gati]

I feel this is too much work.

Check my answer below.

Answer 2

[Mara Gati]

I had the same problem in r2018b. I used this link.

restoredefaultpath

It went back to working normally.

Answer 3

[liqun fang]

我的版本是2020b，我也遇到了这个问题，我的某个app可以通过鼠标右键正常运行，但是打开后会提示提问中的错误，并且appdesigner的运行按钮已经无法点击而且也无法另存为。其余的app都是正常的

我发现这个问题的产生原因是因为app内某一块程序出错，我的是一个面板panel出现了问题，我不知道这个面板出现了什么问题。但是我用MATLAB Online打开这个错误app然后删除掉panel的程序再另存为，之后我电脑的2020b就可以正常打开这个错误app了。但是我需要重新搭建panel这部分的程序。