@url=('$url2', '$url3', '$url4', '$url5', '$url6', '$url7);
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lacks a closing single quote around $url7

To find such errors, comment out regions of code until found.

Incidently, are you sure you want to quote $url2 et al.? This means you get a list with literal '$url2', etc., not with the values of those variables.

Hope this helps, -gjb-