You might come across errors like the following during a Sugar CRM installation:-
PHP Warning:  require_once(modules/Administration/UpgradeHistory.php) [<a href='function.require-once'>function.require-once</a>]: failed to open stream: No such file or directory in /home/<username>/public_html/crm/install/install_utils.php on line 48
[Sun Jan 04 22:44:43 2009] [error] [client 61.95.196.73] PHP Fatal error:  require_once() [<a href='function.require'>function.require</a>]: Failed opening required ‘modules/Administration/UpgradeHistory.php’ (include_path=’.:/usr/lib/php:/usr/local/lib/php’) in /home/<username>/public_html/crm/install/install_utils.php on line 48
This can [...]