scat.rb ERROR

invalid byte sequence in EUC-JP /usr/local/lib/clipnews/mail2html.rb:597:in `gsub!' /usr/local/lib/clipnews/mail2html.rb:597:in `block in trans' /usr/local/lib/clipnews/mail2html.rb:591:in `collect' /usr/local/lib/clipnews/mail2html.rb:591:in `trans' /usr/lib/cgi-bin/scat.rb:259:in `sprint' /usr/lib/cgi-bin/scat.rb:335:in `
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