The WWW::Mechanize constructor already creates a memory-only cookiejar. You don't have to pass any cookie-jar to it unless you need to store / read cookies over multiple sessions.

See CONSTRUCTOR AND STARTUP in the WWW::Mechanize documentation.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re^3: Script using WWW::Mechanize fails to log in by Joost
in thread Script using WWW::Mechanize fails to log in by Anonymous Monk

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