I am running parpool jobs with 10 workers under 2016b on my Mac (Mac Pro “Twelve Core”; 3.06 GHz 6 Core Xeon X5675 x2).
Initial jobs run without error. Over time, however, workers begin to fail with the error:
Error using prefutils>loadPrefs (line 42)
Unable to read MAT-file /Users/myname/Library/Application
Support/MathWorks/MATLAB/R2016b/matlabprefs.mat. File might be corrupt.
After some searching, I found these links. They advise changing the Matlab prefdir prior to starting a parpool job so as to avoid write conflicts within the prefs file:
This advice, however, seems to regard the situation in which multiple parpools are running concurrently.
More generally, I am unable to determine how I would arrange for each worker in a parpool to start with its own, separate prefdir, and if this is even needed to fix the error that I am encountering.
Thanks for any help.