R2020a Java Exception

When I start MATLAB R2020a I get the following message in the command window. MATLAB then seems to work ok. What's causing the problem? Should I be concerned?

Exception in thread "VRD Executor Thread": java.lang.NumberFormatException: For input string: "160116389498¶"

at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65)

at java.lang.Long.parseLong(Long.java:589)

at java.lang.Long.<init>(Long.java:965)

at com.mathworks.vrd.command.ValidateCommandInternal.isTimeForNextValidation(ValidateCommandInternal.java:127)

at com.mathworks.vrd.command.ValidateCommandInternal.validate(ValidateCommandInternal.java:59)

at com.mathworks.vrd.command.ValidateCommandImpl.validate(ValidateCommandImpl.java:34)

at com.mathworks.webintegration.vrd.VRDController$ValidateCommandWorker.run(VRDController.java:230)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)

at java.lang.Thread.run(Thread.java:748)

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[Sean Devlin]

I just received this today in R2021a as well, any solution?

Answer 1

[Animesh]

Hi @Douglas Sondak,

This issue can arise if your MATLAB preferences file has been inadvertently altered or become corrupt.

To resolve this, please regenerate your preferences file by following the steps outlined in this MATLAB Answers post:

https://www.mathworks.com/matlabcentral/answers/99625-how-do-i-regenerate-my-matlab-preferences

If regenerating the preferences does not resolve the issue, check the AppData folder for any preferences from previous releases. If you find any, remove them from the AppData folder.