MATLAB 2014a cannot enable parpool

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Ming 2014-6-12

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/133891-matlab-2014a-cannot-enable-parpool

评论： Sean de Wolski 2014-6-23

Hi, I tried to enable parpool in MATLAB 2014a, it gives following message Error using parpool (line 99) The operation must modify one or more Settings files for these levels: factory, user, but you do not have write permission on these levels: user.

Error in parallel.internal.ui.PoolHelper.startPool (line 11) parpool();

I have all permissions, I tried to uninstall and install again, but after one or two days, this problem come out again

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Elwin Chan 2014-6-16

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Hi Ming,

Thanks for the info. When it is not working, please can you try the following code and reply with the results? (The code won't fix the problem, but might help to diagnose the issue.)

s = Settings;
s.parallel
s.parallel.addNode('test')
s.parallel.test.addKey('testKey')
s.parallel.test.isSet('testKey')
s.parallel.removeNode('test')

Thanks,

Elwin

Ming 2014-6-16

编辑：Ming 2014-6-16

在 MATLAB Online 中打开

Hi,

Thank you for your replying, here are the results

    s = Settings;
s.parallel
s.parallel.addNode('test')
s.parallel.test.addKey('testKey')
s.parallel.test.isSet('testKey')
s.parallel.removeNode('test')

ans =

Settings with no properties.

ans =

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采纳的回答

Elwin Chan 2014-6-23

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/133891-matlab-2014a-cannot-enable-parpool#answer_142104

在 MATLAB Online 中打开

I debugged Ming's MATLAB installation, and the problem was that there was a 3rd party MATLAB toolbox installed that contained a file called assert.m which was higher up on the MATLAB search path than the built-in MATLAB function. This was causing MATLAB's built-in assert function to be shadowed, and caused the error.

You can see which assert function will used by calling

which -all assert

You want built-in (L:\Bparallel\matlab\toolbox\matlab\lang\assert) to be the first one on the list. If it is not the first on on the list, then you should re-arrange your path using MATLAB's path tool.