MATLAB: PID or endpoint file exists error while starting MPS instance

Question

When I try to start my MATLAB Production Server (MPS) instance, I get one of the following errors:

 

Error: ping: main pid file exists, but control endpoint file missing

or

  ERROR: Error: ping: control endpoint file exists, but main pid file missing

How do I resolve this?

 

Answer 1

The issue occurs if the mps_master_app.exe process is killed abruptly.  To resolve it:

1.  Open task manager and kill remaining mps_worker_app.exe processes.

2.  Delete the pid and endpoint folders in the MPS instance directory.

Restart the instance.