Disallow running an App in an older version of ML?

Question

Chris 2020-1-9

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/499631-disallow-running-an-app-in-an-older-version-of-ml

评论： Sean de Wolski 2020-1-9

Is there a way to disallow or inform the user that they cant run an installable App in an older version of ML?

I have made an App that is used across my company; and have coworkers who are trying to use the app in older versions of ML where it crashes with cryptic messages. I made the app in 19a; after installing in anything older than 18a it crashes when run. Apparently, I am using some features that were added in 18a and are not back compatible (this is fine; I am glad ML is adding new features!).

The app crashes before getting to the StartupFcn, so I cant do a version test in there.

I have no problem requiring my coworkers to use 18a or newer to use the app but I need a way to communicate that; ideally it should not install in older versions or give a meaningful error when run. I am distributing the app via an internal repository.

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Answer 1

Ruger28 2020-1-9

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https://ww2.mathworks.cn/matlabcentral/answers/499631-disallow-running-an-app-in-an-older-version-of-ml#answer_409427

编辑：Ruger28 2020-1-9

在 MATLAB Online 中打开

if verLessThan('matlab','9.4') % 2018a = 9.4
    disp('Version of Matlab is too old. Please open in MATLAB 2018a or later.')
else
    % run your app
end

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Chris 2020-1-9

Sean,

I will give a wrapper a try, thanks.

I see you are MathWorks staff, can we expect that version requirements will get added into the App designer or the packageing process at some point?

-Chris

Sean de Wolski 2020-1-9

Hi Chris,

Version requirements are already enforced in that a user of an older version gets an error. It could just probably be a nicer error message provided like you're saying. I'm not in development so can't comment on their plans but I can say that you contacting them via tech support and complaining is the best way to motivate them to do things :)

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