4.0 Update Error updating

Warning: require(/home/dummy/subdomains/dummy/wp-content/home/dummy/subdomains/dummy/wp-content/upgrade/version-current.php) [function.require]: failed to open stream: No such file or directory in /home/dummy/subdomains/dummy/wp-admin/includes/update-core.php on line 785

Fatal error: require() [function.require]: Failed opening required ‘/home/dummy/subdomains/dummy/wp-content/home/dummy/subdomains/dummy/wp-content/upgrade/version-current.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/dummy/subdomains/dummy/wp-admin/includes/update-core.php on line 785