Help takes forever to load and I get a Java related error

Hello, I get an error when I call the help function. The error message is below

Exception in thread "IPC Process Thread" java.lang.UnsatisfiedLinkError: C:\Users\Sherif\AppData\Local\Temp\jxbrowser-chromium-43.0.2357.52.5.4.2\data\Temp\jxbrowser-common64-147780a3-3fb1-42ab-b4f4-9e6ff0295970.dll: Access is denied
  
at java.lang.ClassLoader$NativeLibrary.load(Native Method)

  at java.lang.ClassLoader.loadLibrary1(Unknown Source)

  at java.lang.ClassLoader.loadLibrary0(Unknown Source)

  at java.lang.ClassLoader.loadLibrary(Unknown Source)

  at java.lang.Runtime.load0(Unknown Source)

  at java.lang.System.load(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.LibraryLoader.loadLibrary(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.SharedMemoryLibrary.<init>(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.SharedMemoryLibrary.getInstance(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.ipc.ChromiumProcess.start(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.ipc.d.run(Unknown Source)

  at java.lang.Thread.run(Unknown Source)

Exception in thread "IPC Process Thread" java.lang.UnsatisfiedLinkError: C:\Users\Sherif\AppData\Local\Temp\jxbrowser-
chromium-43.0.2357.52.5.4.2\data\Temp\jxbrowser-common64-49b24786-2e19-4e4e-900e-e6f45703da1d.dll: Access is denied

  at java.lang.ClassLoader$NativeLibrary.load(Native Method)

  at java.lang.ClassLoader.loadLibrary1(Unknown Source)

  at java.lang.ClassLoader.loadLibrary0(Unknown Source)

  at java.lang.ClassLoader.loadLibrary(Unknown Source)

  at java.lang.Runtime.load0(Unknown Source)

  at java.lang.System.load(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.LibraryLoader.loadLibrary(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.SharedMemoryLibrary.<init>(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.SharedMemoryLibrary.getInstance(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.ipc.ChromiumProcess.start(Unknown Source)

  at com.teamdev.jxbrowser.chromium.internal.ipc.d.run(Unknown Source)

  at java.lang.Thread.run(Unknown Source)

Not sure exactly what is causing this.

I appreciate your help.

[Dylan Wolff]

It looks to me like this error is occuring because JxBrowser does not have the proper permissions for a file it needs access to in your temporary directory; I have a few ideas that might work.

1) You can try manually changing the permissions for the file (or the directory that contains it) listed in the error message.

2) If that doesn't work or is not possible given your system setup, you can specify an alternative location with the proper permissions as your temporary directory in your java.opts file as explained here:

http://www.mathworks.com/help/matlab/matlab_env/java-opts-file.html

Specifically, you will need to set the following property:

-Djava.io.tmpdir

You can query the value of your temporary directory using the following command in MATLAB to ensure that the change took place:

>> java.lang.System.getProperty('java.io.tmpdir');

3) As a third option, you can switch to a different version of the default renderer for your help browser by executing the following command in MATLAB:

>> com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLPANEL');

4) You can also try changing the renderer altogether with this command:

>> webutils.htmlrenderer(‘basic’);

I hope this helps!

[Walter Roberson]

Dylan Wolff, I recommend that you post that as an Answer.

[Mohamed Abdelsamie]

Hi Dylan,

Thanks a lot for your help. Changing the default renderer version did the trick. I hope it doesn't have an effect on performance.

Walter, I'd like to mark Dylan's comment as the answer. Do you know how to do that?

[Walter Roberson]

Dylan will need to enter the comment as an Answer for it to be accepted.

[Dylan Wolff]

I'm glad it helped Mohamed! I just added the comment as an answer. Thanks for pointing that out Walter!

[Damon DeLuca]

Greetings,

We are having this issue when running an executable in 2019a with the MCR directory. The executable runs, but when we try to use certain functions/buttons the "jxbrowser....:Access Denied'' locks up the program. No problems when running the program from Matlab 2019a.

In local environment variables, MCR_CACHE_ROOT is set to a temp folder with all permissions allowed. The "TEMP" and "TMP" variables are also set to the same temp folder.

I tried adding the change default renderer suggestion to the opening function of the main .m file and recompiled. That didn't help.

We distribute this program to many users on Navy NMCI network and need it to work -- any additional ideas will be appreciated!

Answer 1

[Dylan Wolff]

It looks to me like this error is occurring because JxBrowser does not have the proper permissions for a file it needs access to in your temporary directory; I have a few ideas that might work.

1) You can try manually changing the permissions for the file (or the directory that contains it) listed in the error message.

2) If that doesn't work or is not possible given your system setup, you can specify an alternative location with the proper permissions as your temporary directory in your java.opts file as explained here:

http://www.mathworks.com/help/matlab/matlab_env/java-opts-file.html

Specifically, you will need to set the following property:

-Djava.io.tmpdir

You can query the value of your temporary directory using the following command in MATLAB to ensure that the change took place:

>> java.lang.System.getProperty('java.io.tmpdir');

3) As a third option, you can switch to a different version of the default renderer for your help browser by executing the following command in MATLAB:

>> com.mathworks.mlwidgets.html.HtmlComponentFactory.setDefaultType('HTMLPANEL');

4) You can also try changing the renderer altogether with this command:

>> webutils.htmlrenderer(‘basic’);

I hope this helps!

[Michel Bourdon]

you may also run Matlab as admin BR Michel

Answer 2

[Dev-iL]

I started having the same problem after a Win10 update, which for some reason messed up the permissions of the user Temp folder.

What helped in my case was to go to the folder specified in the error (C:\Users\<username>\AppData\Local\Temp\), go to its properties > Security tab > Advanced, and allow full control.

Be advised that this solution requires admin permissions on the system.