The part after "at" probably lists a line number from your code, or from the module you're using. But you showed no code in your post. I think we're going to need more information than you've provided if we are to help you with this issue. Please post a minimally constructed executable snippet of code that replicates your error.

Do you mean LWP, instead of LPW? I did a search for LPW and Perl, and came up with the same blank that my mind produced when I read your question.