Don’t know if it’s related to my upgrade from 10.10 to 10.11, but today i could not connect to oracle databases using navicat with the error “OID could not be created”.
To fix it type this in Terminal:
$ sudo scutil --set HostName my.host.name
Then also add this name to the localhost line in /etc/hosts
127.0.0.1 localhost my.host.name
Then restart your computer.