MATLAB 2014a cannot enable parpool

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Ming
Ming on 12 Jun 2014
Commented: Sean de Wolski on 23 Jun 2014
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
  4 Comments
Elwin Chan
Elwin Chan on 16 Jun 2014
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
Ming on 16 Jun 2014
Edited: Ming on 16 Jun 2014
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 =
0

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Accepted Answer

Elwin Chan
Elwin Chan on 23 Jun 2014
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.
  2 Comments
Ming
Ming on 23 Jun 2014
Thank you again Elwin, the MATLAB is now running fine.
Sean de Wolski
Sean de Wolski on 23 Jun 2014
I've seen uses' asserts break lots of things; it's probably the most shadowed function I've seen.

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