''I'm using NC Houdini, it was all fine until today when I tried to start Houdini, it tells me that sesinetd is not running, so I manually restart the license server but it still doesn't seem to be running, not sure what could be causing this. I'm using CentOS.''

SOLVED by reinstalling and changing hostname

I used systemctl to show all running services, I can confirm sesinetd status is ‘loaded active running’. But it's still trying to connect to license server

update: I reinstalled houdini, and I can see the nc license showed up in license administrator tool; however, now I have this error message popping up: ERROR: Invalid machine name: localhost.localdomain