CiviCRM Community Forums (archive)

On www.egioiellerie.com it is clone of www.forniture-alberghiere.net I'm going to uninstall civicrm to be sure to not do strange things, because I'm going to setup a group of drupal 6.10 multisites, but when I press uninstall civicrm , I get a white page with this message:
File does not exist.
Fatal error: require_once() [function.require]: Failed opening required 'CRM/Utils/System.php' (include_path='.:/usr/lib/php:/usr/local/lib/php') in /home/fornitur/public_html/egioiellerie.com/sites/all/modules/civicrm/drupal/civicrm.module on line 239

It is enough just to delete all files of Civicrm to uninstall it?
It is not installed into drupal db, but into a different DB.