subdomain DNS failure: loading from master file failed: file not found

I use CWP7 as the web panel of my VPS. I just tried to add a new account with a domain like demo.example.com but it seems something is wrong with its DNS records.

When I want to add the domain to CentOSFreeDNSManager I face this error:

zone demo.example.com/IN: loading from master file /var/named/demo.example.com failed: file not found
zone demo.example.com/IN: not loaded due to errors.

here are the records I added to the CeonOSFreeDNSManager.


However, the /var/named/demo.example.com file exists.

Also, I checked the domain by this command:

named-checkzone demo.example.com /var/named/demo.example.com

and the result is:

zone demo.example.com/IN: loaded serial 2013071600
OK

I already did this many times and the subdomain worked without any extra kinds of stuff.

Here is the zone records of the subdomain generated by the CWP7 automaticly:

Code: [Select]

    ; Generated by CWP
    ; Zone file for demo.example.com
    $TTL 14400
    demo.example.com.      86400        IN      SOA     ns1.centos-webpanel.com. behnamazimi.gmail.com. (
    2013071600      ; serial, todays date+todays
    86400           ; refresh, seconds
    7200            ; retry, seconds
    3600000         ; expire, seconds
    86400 )         ; minimum, seconds
   
    demo.example.com. 86400 IN NS ns1.centos-webpanel.com.
    demo.example.com. 86400 IN NS ns2.centos-webpanel.com.
   
    demo.example.com. IN A 152.***.***.***
   
    localhost.demo.example.com. IN A 127.0.0.1
   
    demo.example.com. IN MX 0 demo.example.com.
   
    mail IN CNAME demo.example.com.
    www IN CNAME demo.example.com.
    ftp IN CNAME demo.example.com.
    ; Add additional settings below this line
    _dmarc 14400 IN TXT "v=DMARC1; p=none"