If you are getting following error while creating the subdomain
Error reloading bind on ServerName: rndc:
Then you need to check the named configuration file that is /etc/named.conf something is messed up there.
Try to reload the named and if its giving you any error lke
Error reloading bind then run this script
If its that even gives you any error then
!! /var/named/domain.com.db does not exist, unable to locate.
!! Run /scripts/cleandns to remove zone without corresponding files.
!! Or locate the proper zone file and place in /var/named and rerun
!! This script with the following options: /script/fixndc -fv
Then run /scripts/cleandns and reload named that will solve your problem.
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