There's one other thing in the code that might trip you up if it's still there. Just before the "open()", you're setting "$filename" to "temp.pl", but opening "temp2.txt", and reporting an error on "$infilename", which is not defined.

Even experienced programmers can read a line with these types of errors and see what they meant to write, rather than see the error, so it's a good thing to fix, even if it's not what's giving you problems right now. ("use strict" will help you with the two different variable names, but not with opening "temp2.txt" instead of using the name in the variable.)

Good luck, and keep plugging away.