Please Help

Hi 
I am a student an I'm new to Perl. For a university assignment I need to read 
the contents of a text file in an array. I am using Windows. The code I am 
writing is:

$file = "/test.txt";
open (INFO, "$file");
@lines = <INFO>;
close(INFO);

Altough this is supposed to work, I am getting a ''readline() on closed 
filehand INFO at line 3' message when I interpret it with perl -w. Please Help