Why do I receive the error "The application encountered an unexpected error and needs to close. You may want to try re-installing your product(s)," at 0% when installing MATLAB?

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When installing MATLAB I get the error above at 0% in the installer. The error additionally suggest looking at the installation log. The installation log has the following error:
java.lang.NullPointerException
    at com.mathworks.install.ComponentSizeAggregator.add(ComponentSizeAggregator.java:13)
    at com.mathworks.install.ProductInstallerImpl.downloadProducts(ProductInstallerImpl.java:143)
    at com.mathworks.install.ProductInstallerImpl.installProducts(ProductInstallerImpl.java:81)
    at com.mathworks.install.InstallerImpl.install(InstallerImpl.java:113)
    at com.mathworks.installwizard.model.InstallTask.execute(InstallTask.java:46)
    at com.mathworks.installwizard.model.AbstractBackgroundTask.execute(AbstractBackgroundTask.java:38)
    at com.mathworks.installwizard.model.AbstractTask.call(AbstractTask.java:74)
    at com.mathworks.installwizard.model.AbstractTask.call(AbstractTask.java:24)
    at com.mathworks.wizard.worker.WorkerImpl.doInBackground(WorkerImpl.java:24)
    at javax.swing.SwingWorker$1.call(SwingWorker.java:296)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at javax.swing.SwingWorker.run(SwingWorker.java:335)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Error: The application encountered an unexpected error and needs to close.  You may want to try re-installing your product(s).  More information can be found at /var/folders/4l/_2c57spd59vcxrz3kb8t3s600000gn/T/mathworks_username.log

Accepted Answer

MathWorks Support Team
MathWorks Support Team on 21 Sep 2017
The issue is likely related to old cached files in the MathWorks folder in Downloads.  Removing this folder will allow the installation to continue.
  1 Comment
Steven Lord
Steven Lord on 5 Apr 2018
I recommend you contact Technical Support directly using the Contact Us link in the upper-right corner of this page. They can work with you to determine why you're still experiencing this problem and how to correct or avoid it.

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