Problem with starting parpool

Hello community,

I tried to run a code which worked for a 2011 version of Matlab. Initially, the code used matlabpool to pool the cores. Now I had to replace matlabpool by parpool for the newest version of Matlab. However, I get the following message error:

Caused by: Error using parallel.internal.pool.InteractiveClient>iThrowWithCause (line 675) Failed to start pool. Error using parallel.Job/addClientPath (line 862) Invalid value specified for property 'NumPathsToAppend'. Allowed values are positive integer scalars.

What am I doing wrong?

Best regards.

[BVDKH]

I had to add my paths after starting a pool to solve the error.

[Walter Roberson]

Roberto https://www.mathworks.com/matlabcentral/profile/authors/16658921 comments to @BVDKH

Thank you!

Answer 1

[Darshan Ramakant Bhat]

This error may occur due to inaccessibility of pathdef.m for MATLAB. Please try the following workaround

Try running the following commands in the MATLAB Command Window:

>> restoredefaultpath >> savepath

Once done, restart MATLAB and then try to start a parallel pool again. If there is an error in accessing the file:

C:\Program Files\MATLAB\R2016b\toolbox\local\pathdef.m, then delete the pathdef.m file so that on execution of the command, the file gets recreated.

[Anthony Crockford]

Thank, this was helpfull!