Named service failing in Plesk ?

Issue with named service :

When trying to restart named, you get an error stating some parameter is not given correctly in a zone file.

It would be a reverse PTR zone file with name something like this:
x.x.x.in-addr.arpa

Open the zone file using vim ,

# vim /var/named/run-root/var/72.200.xx.in-addr.arpa.db

When you check the file you can see a mis-configuration in a particular line
when compared with other lines. You can easily spot that with your naked eye.

Edit that misconfigured line (check how other lines are written ) and save it and restart
named service.

This is a bug which is seen in some older versions of Plesk.