can somebody please help me to fix this error:

"
Warning: require_once(modules/Home/metadata/popupdefs.php) [function.require-once]: failed to open stream: No such file or directory in C:\wamp\www\sugar\include\Popups\Popup_picker.php on line 64

Fatal error: require_once() [function.require]: Failed opening required 'modules/Home/metadata/popupdefs.php' (include_path='C:\wamp\www\sugar\include/..;.;C:\php5\pear') in C:\wamp\www\sugar\include\Popups\Popup_picker.php on line 64
"

I see this error when I create a new module with a new field assign_user_name and I what to select a user