Dear Pierre:
There are some mistakes when I run the psom program:

Error: File: psom_run_script.m Line: 413 Column: 29
Unexpected MATLAB expression.

The Line 413 Column 29 is
psom_ppn = getenv("PSOM_WORKER_PPN") 

1）Double quotes are invalid characters in MATLAB, and I found out the Syntax os getenv is single quotes(http://cn.mathworks.com/help/matlab/ref/...), so I I turned double quotes into single quotes;
2)  But MATLAB still display the mistake "Error: File: psom_run_script.m Line: 413 Column: 29
Unexpected MATLAB expression."

Thanks so much.