I've shortened most of the pages' URL and I need to inform people through the Error page when they search for a page using the old URL.
I've tried to modify the page.php file (Piano Black theme version 1.5) replacing " Sorry, but you are looking for something that isn't here." with ""Sorry, but you are looking for a page which has been removed. Go back to the HOME page and try again using the main navigation MENU to find what you're looking for: most of the official website’s pages now have a shortened URL." but it doesn't run.
Could you please help me with this? Thanks a lot.