drupl 6 open_basedir restriction in effect

drupl 6 open_basedir restriction in effect
i got this problem many time but now m get the solution

warning: tempnam(): open_basedir restriction in effect. File() is not within the allowed path(s): (/var/www/vhosts/hiltenfingen.de/:/tmp/) in /var/www/vhosts/hiltenfingen.de/httpdocs/includes/file.inc on line 815.


answer: go admin->site cofiguration->setting and set the site/default/fils