what is this error

From: Jimmy Stewpot <xtc@dont-contact.us>
Date: Thu, 1 Jun 2000 11:34:58 +1000

Hello
what does this error message mean ?
NONE/400 1598 NONE error:unsupported-request-method - NONE/-
Thankyou
Jimmy stewpot
Received on Wed May 31 2000 - 19:36:43 MDT

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