Solution for "NameVirtualHost *:80 has no VirtualHosts"

Symptom:
## Environment: Apache2.2.9 / Ubuntu 8.10 ##

1. After add virtual host, I got this error message from the error.log
2. In the new vhost file:
   
   ServerName myhost.server.com
3. In default vhost file:
   
   
4. In ports.conf
   "NameVirtualHost *:80"

Solution:

1. Make sure all VirtualHost tag match NameVirtualHost. i.e.: *.80
2. ServerName must match the hostname.
3. Change the new vhost file:
   
   ServerName myhost.server.com
4. In default vhost file:
   
   ServerName www.server.com
5. Restart, observe error.log and try to reach the site from browser

OK, Problem solved.