Unable to read resource????

hi,

I am using apache as the local server.When i am loading the page its giving this warning. since i am new to php i am not able to understand what is causing this error.

Warning: Smarty error: unable to read resource: "invitation.html" in C:\apachefriends\xampp\htdocs\MIMS\include\smarty\Smarty.class.php on line 1083

Post the source of the PHP script that is giving the error. Not the Smarty.class.php file.

That error is generated by the smarty template engine when it cannot find the template file. The template file invitation.html must exist in the template directory configured with Smarty.