No. Why would it be? There's no system error. There's merely a usage error.

You didn't make a system call that failed ($!) and there's no caught exception ($@). Your program didn't get called with any arguments, which your code detects itself, and there's no more information to provide about the source of the error--you know exactly what the source of the error is!

Now I prefer to write that code as:

... mostly because I prefer the boolean check of the number of elements in @ARGV to checking the number of the last array index.