Xcode4.5.2とMacRuby0.12を使用しています。Spreadsheet gemを使用する必要がありますが、プログラムを実行しようとすると「署名」の問題が発生し続けます。
/Library/Ruby/Gems/MacRuby/0.13/gems/ruby-ole-1.2.11.5/lib/ole/storage/base.rb:372:in `validate!': OLE2 signature is invalid (Ole::Storage::FormatError)
from /Library/Ruby/Gems/MacRuby/0.13/gems/ruby-ole-1.2.11.5/lib/ole/storage/base.rb:364:in `initialize'
from /Library/Ruby/Gems/MacRuby/0.13/gems/ruby-ole-1.2.11.5/lib/ole/storage/base.rb:105:in `load'
from /Library/Ruby/Gems/MacRuby/0.13/gems/ruby-ole-1.2.11.5/lib/ole/storage/base.rb:72:in `initialize'
from /Library/Ruby/Gems/MacRuby/0.13/gems/ruby-ole-1.2.11.5/lib/ole/storage/base.rb:78:in `open'
from /Library/Ruby/Gems/MacRuby/0.13/gems/spreadsheet-0.7.4/lib/spreadsheet/excel/reader.rb:1179:in `setup'
from /Library/Ruby/Gems/MacRuby/0.13/gems/spreadsheet-0.7.4/lib/spreadsheet/excel/reader.rb:121:in `read'
from /Library/Ruby/Gems/MacRuby/0.13/gems/spreadsheet-0.7.4/lib/spreadsheet/excel/workbook.rb:32:in `open'
from /Library/Ruby/Gems/MacRuby/0.13/gems/spreadsheet-0.7.4/lib/spreadsheet.rb:62:in `open'
from /Library/Ruby/Gems/MacRuby/0.13/gems/spreadsheet-0.7.4/lib/spreadsheet.rb:68:in `open'
OLE gemはMacRubyと互換性がありますか？ここでの私のオプションは何ですか？
ご協力いただきありがとうございます。