"open_basedir restriction in effect", but "open_basedir" is well configured

[guarriman]

Hi.

 

Using PHP5, I get this error code in my webpages:

 

Warning: file_exists() [function.file-exists]: open_basedir restriction in effect. File(/usr/share/pear/plugins/compiler.t.php) is not within the allowed path(s): (/var/www/vhosts/mydomain.com/httpdocs:/tmp) in /var/www/vhosts/mydomain.com/httpdocs/lib/smarty/core/core.get_include_path.php on line 34

 

I don't know where '/var/www/vhosts/mydomain.com/httpdocs:/tmp' comes from, because with my "phpinfo" page I get these values of "open_basedir", in Local and in Master:

/var/www/vhosts/mydomain.com/httpdocs:/usr/share/pear/plugins:/usr/share/php/plugins/

 

Any suggestion?