Moving installation from root to subfolder

[Telemachus]

I want to move my current (working) Contao installation from the root to a subfolder. I adjusted the websitePath in the localconfig.php, and the RewriteBase in the .htaccess and moved all files from the root to the subfolder. But when I load the website from the new location I get the following errors:

Warning: require(/www/htdocs/domainname/http/system/functions.php) [function.require]: failed to open stream: No such file or directory in /www/htdocs/domainname/http/system/initialize.php on line 39

Fatal error: require() [function.require]: Failed opening required '/www/htdocs/domainname/http/system/functions.php' (include_path='.:/usr/share/php:/usr/share/pear') in /www/htdocs/domainname/http/system/initialize.php on line 39

Strange that the error points to the old root configuration.

It can't be the .htaccess file I think, because when I remove it the error is still the same.

What can it be? I hope someone can help me out.

[ga.n]

did you removed the .htaccess from the parent folder? (i.e. the old website root)

I guess no