Matlab gives "ContributedToolsLoader" error
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Whenever I try to open Matlab, it throws error as below. I just downloaded the app, and try to open a m file.
Also, I added screnshot as well.
PC is Macbook Pro Catalina version 10.15
Exception in thread "ContributedToolsLoader": java.lang.NoClassDefFoundError: Could not initialize class java.nio.file.FileSystems$DefaultFileSystemHolder
at java.nio.file.FileSystems.getDefault(FileSystems.java:176)
at java.io.File.toPath(File.java:2234)
at com.mathworks.resources_folder.ResourcesFolderUtils.getResourcesFolderName(ResourcesFolderUtils.java:31)
at com.mathworks.mde.desk.ContributedTools.constructToolSetFileName(ContributedTools.java:103)
at com.mathworks.mde.desk.ContributedTools.<init>(ContributedTools.java:65)
at com.mathworks.mde.desk.ContributedToolsLoader$3.run(ContributedToolsLoader.java:69)
at java.lang.Thread.run(Thread.java:748)
Exception in thread "Startup Class Loader": java.lang.NoClassDefFoundError: Could not initialize class com.mathworks.instutil.InstutilResourceKeys
at com.mathworks.mlwidgets.help.DocCenterRoot.initDocRelease(DocCenterRoot.java:44)
at com.mathworks.mlwidgets.help.DocCenterRoot.<clinit>(DocCenterRoot.java:26)
at com.mathworks.mlwidgets.help.HelpPrefs.<clinit>(HelpPrefs.java:57)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.mathworks.mlservices.MLHelpServices.getDocRoot(MLHelpServices.java:522)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getDocrootDirectory(ProductInfoUtils.java:707)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAbsolutePath(ProductInfoUtils.java:694)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFile(ProductInfoUtils.java:259)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.parseFiles(ProductInfoUtils.java:319)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.pathChanged(ProductInfoUtils.java:154)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<init>(ProductInfoUtils.java:80)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.getAllProductsInfo(ProductInfoUtils.java:900)
at com.mathworks.mlwidgets.util.productinfo.ProductInfoUtils.<clinit>(ProductInfoUtils.java:66)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:264)
at com.mathworks.mde.desk.StartupClassLoader$LoadInfo.<init>(StartupClassLoader.java:112)
at com.mathworks.mde.desk.StartupClassLoader.createLoadInfos(StartupClassLoader.java:202)
at com.mathworks.mde.desk.StartupClassLoader.access$500(StartupClassLoader.java:25)
at com.mathworks.mde.desk.StartupClassLoader$2.run(StartupClassLoader.java:223)
at java.lang.Thread.run(Thread.java:748)
回答（2 个）
Prabhanjan Mentla
2020-10-28
0 个投票
Jonathan Weaver
2020-11-30
编辑：Jonathan Weaver
2020-11-30
0 个投票
I have the same error. It just started - I've been running 2020b for some time with no issue! Tried remove/reinstall but the issue is still there.
3 个评论
Thomas Montenegro-Johnson
2020-12-10
Exactly the same with me - very frustrating when you only get about an hour a week to do actual research!
Stanislas Dumas
2020-12-17
I got the exact same prblem starting today, still works fine on an old computer, was working fine today until it broke all of a sudden (I didn't update or change anything)
Loic Daridon
2024-6-7
I have the same pb since yesterday. matlab worked last week and know I have this error. I do not have made update of my IOS 13.66. any idea how to fix it I get matlab R2019b
thks
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2020-10-21
2024-6-7
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