Actually I am using strict - the my declaration for $x, $y, and $z was elsewhere.

Well that's just silly.

Now I have to track down exactly where.

If you scoped your variables properly, it might make that task easier.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

In reply to Re^7: Handling HUGE amounts of data by BrowserUk
in thread Handling HUGE amounts of data by Dandello

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