The HTTP::Request::content() method is described as: "$r->content( $bytes ) ... Note that the content should be a string of bytes.", so what do you expect it to do with an anonymous array containing a list of strings:  $req->content([%post_parameters]);?

You should be using the LWP::UserAgent::post() method: "$ua->post( $url, \%form )".

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In reply to Re: Posting files to Amazon MWS using LWP by BrowserUk
in thread Posting files to Amazon MWS using LWP by rethaew

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