Workaround for java error

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KAE 2017-10-31

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https://ww2.mathworks.cn/matlabcentral/answers/364341-workaround-for-java-error

编辑： Deepu George Kurian 2021-3-18

I have a graphics intensive Matlab script that occasionally gives the error

Exception in thread "AWT-EventQueue-0" javax.media.nativewindow.NativeWindowException: Error windowHandle 0, werr: 0

Would love guidance on eliminating this. I found this set of workarounds, but did not get success by updating the driver, turning off off GraphicsSmoothing, or switching to opengl('save','software') or opengl('save','hardwarebasic'). In case it's relevant, I have a 64 bit machine but am using the 32-bit version of R2015b (required by some hardware).

Here is the full java error message,

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KAE 2017-12-14

编辑：KAE 2017-12-14

I am still occasionally getting long Java errors when I run GUIs, and when they occur the GUI's message boxes are blank instead of displaying their intended text and pushbuttons are hidden (they reappear when a cursor is hovered over them). I will try running on 64-bit 2017b instead of 32-bit 2015b to see if this solves the problem. Again just mentioning this consequence of a java error, in case someone has a similar issue.

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Answer 1

KAE 2017-11-3

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https://ww2.mathworks.cn/matlabcentral/answers/364341-workaround-for-java-error#answer_289319

Later we found two versions of java on my machine, 32 and 64 bit, so we deleted the 32 bit. That seemed to eliminate the error. I am answering this question myself in case it helps someone else out.

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Image Analyst 2017-11-20

Thanks for sharing this non-obvious answer. I'm sure it might help someone someday.

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Answer 2

Olivier Sauter 2019-1-19

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https://ww2.mathworks.cn/matlabcentral/answers/364341-workaround-for-java-error#answer_357106

I had many error messages when starting matlab and could not open the matlab editor, matlab although was working otherwise.

I tried resetting the .matlab and various preferences

At the end I simply needed to remove the felix-cache folder, which we should do regularly but keep forgetting...

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Deepu George Kurian 2021-3-17

编辑：Deepu George Kurian 2021-3-18

I am encountering the exact same problem right now with my Matlab R2018b. Could you please elaborate on what you had to do? (I am not that good with these) @Olivier Sauter

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