services::​io::PrintF​ormat name specified

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Flavio Sartoretto
Flavio Sartoretto 2020-6-21
评论： Imoleayo Abel 2020-7-20
Hi,
after installing prerelease R2020b on Ubuntu 18, commnads like "ls" produce the error string
Caught "std::exception" Exception message is:
unknown services::io::PrintFormat name specified.
I browsed the known problems. No answer.
Any hint?
Best.

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回答（1 个）

Raunak Gupta
Raunak Gupta 2020-6-24
Hi,
This is a known issue. In order to resolve the issue, you may remove the preferences folder "prefdir" and re-start MATLAB.
You can also refer to the following link to reset the preference folder:
https://www.mathworks.com/matlabcentral/answers/99625-how-do-i-regenerate-my-matlab-preferences
The steps are the same except you must do it for the R2020b folder.
Hope it helps!
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Imoleayo Abel
Imoleayo Abel 2020-7-4
Experiencing the same problem with R2020b prerelease on macOS Catalina 10.15.6
This solution works but completely eliminates all inherited preferences which is undesirable; (albeit temporarily since I renamed instead of removed the previous preference folder with the hopes of restoring in the future when a more specific solution becomes available). It took time to configure MATLAB to my preferred look, feel, and behavior; and it has been nice that updates (and prereleases) correclty inherited these preferences except for this current prerelease. I really hope we get a more specific solution eventually.
Thanks for the workaround nonetheless.
Imoleayo Abel
Imoleayo Abel 2020-7-20
I messaged MATLAB support and got a fix that avoids resetting my preferences entirely. Apparently the issue is due to the Numeric Format setting being corruped. To fix this, I only had to do the following:
>> s = settings;
>> s.matlab.commandwindow.NumericFormat.PersonalValue = 'short';

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