Yes I removed /usr/local/ispconfig/server/conf-custom/vhost.conf.master and restored /usr/local/ispconfig/server/conf/vhost.conf.master from the original package file but still same result.
After removing the line beginning with "<tmpl_loop name="vhosts">" from /usr/local/ispconfig/server/conf/vhost.conf.master it works.
The loop "<tmpl_loop name="redirects">" doesn't generate anything.
So I think there is a problem with the script that handles the generation of the loops. Don't you think ?