I bought a parallel processing toolbox but the java semaphore object isn't being set in worker process.

The java semaphore object is being release() on main matlab script, e.g., the count permit increase by 1, but the worker process tryAcquire() with timeout always fails. This is using parfeval().

Answer 1

[Walter Roberson]

The worker and the controlling client are in different processes.

You might be able to use https://www.mathworks.com/matlabcentral/fileexchange/32489-semaphore