nsrlcpd is not running for this jukebox, Networker 7.6.3

Sometimes Networker Management Console software seem to be not functioning well.
I could start the application but could not mount/unmout, label, inventory the tapes on a tape drive.
Error message is "nsrlcpd is not running for this jukebox". And sometimes library gets disabled.
Scheduled backup is not running also.
This problem occurred intermittently, but I don't know the cause.

On a physical library, manually mounting or unmounting of tapes are fine.
Rebooting the library and server may not fix the issue. but sometimes it does.

These are the steps I made to resolve the issue.

1. Shutdown library
2. Close Networker Management Console and shutdown server
3. Start library
4. Once library is up, start networker server
5. On a networker server, open services.msc and start these services: Network Backup & recovery, EMC GST Service, Networker Remote Exec. Service
6. Start Networker Management Console and check if you could able to mount or inventory
7. If error still appear, restart Networker Remote Exec. Service service again.
8. Open the Networker Management console again as it will close automatically after service is restarted.
9. After performing above procedure, My networker is now working.