yahooのcsvデータを開こうとすると下記エラー表示がでて開きません。
改善策をお願い致します。

C:/Users/y8s-0006/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1782:in `sub!'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1782:in `block in shift'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1776:in `loop'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1776:in `shift'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1718:in `each'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1732:in `to_a'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1732:in `read'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/lib/ruby/2.0.0/csv.rb:1291:in `parse'
C:/Users/yyyy/AppData/Local/Temp/ocr6837.tmp/src/fastcsv.rb:66:in `<main>'
invalid byte sequence in Windows-31J