it's in my prev. post. It's the same content.
In the meanwhile I realised that if I import the zone it won't export / create it as pri.skyking.hu in the /etc/bind folder. So I deleted a CNAME record that was for skyking.hu. CNAME www.skyking.hu
. and it forced to export the file to the
/etc/bind folder, soon after the bind9 program managed to read it in and the zone started to work.
Was it perhaps this CNAME record that caused the bind9 to stop...? Not sure but currently it seems to work.