Warning from using parpool

Hi, MATLAB users and experts around the world:

I recently jumped into the newer version that is 2019b, and I start to get a warning everytime I try to start a parallel pool using parpool.

I am a longtime MATLAB user and I stayed with 2016b for quite a while now. So this is a fresh issue for me. I also want to mention that I do my computation on a cluster and the parallel pool does start correctly. It is just the waning that annoy me and it appears like below:

[Warning: P-file /apps/matlab/R2019b/toolbox/matlab/datatypes/isprop.p is older

than MATLAB file /apps/matlab/R2019b/toolbox/matlab/datatypes/isprop.m.

/apps/matlab/R2019b/toolbox/matlab/datatypes/isprop.p may be obsolete and may

need to be regenerated.

Type "help pcode" for information about generating P-files.]

[> In parallel.Pool.get.Cluster (line 200)

In parallel.Pool (line 392)

In parallel/Pool/hBuildPool (line 586)

In parallel.internal.pool.doParpool (line 18)

In parpool (line 98)

In CN30_nci_1 (line 107)]

I wonder if anyone can help me resolve this issue.

Regards

[Walter Roberson]

The easiest way to fix the problem might be to reinstall MATLAB itself (you do not need to reinstall any toolboxes)

Possibly /apps/matlab/R2019b/toolbox/matlab/datatypes/isprop.m accidentally got modified

[Yuguo Yu]

Hi, Walter:

Thanks for commenting on my query, but your suggestion may be out of question, since I do run my simulation on a cluster where I absolutely get no right to install or re-install anything :)...

Regards

[Walter Roberson]

This is not something that you can fix yourself if you do not have administrative access.

Answer 1

[Raghav Bansal]

Hi Yuguo,

Based on the issue, I think this must be an installation issue. I would recommend you to perform a clean installation of MATLAB. To learn more about it, please refer to the following MATLAB Answer:

https://www.mathworks.com/matlabcentral/answers/131519-how-do-i-perform-a-clean-installation-of-matlab

I hope this helps.