rubyXL: Problems during unzipping on xls file parsing

I have a normal xls file i want to parse. So, I’m doing this:

RubyXL::Parser.parse "path/to/file.xls", skip_filename_check: true

And I get the following error :

Zip::ZipError: Zip end of central directory signature not found from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_central_directory.rb:97:in get_e_o_c_d' from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_central_directory.rb:55:inread_e_o_c_d’ from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_central_directory.rb:85:in read_from_str from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_file.rb:67:inblock in initialize’ from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_file.rb:66:in open' from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_file.rb:66:ininitialize’ from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_file.rb:87:in new' from /usr/local/lib/ruby/gems/1.9.1/gems/rubyzip-0.9.9/lib/zip/zip_file.rb:87:inopen’ from /usr/local/lib/ruby/gems/1.9.1/gems/rubyXL-1.2.10/lib/rubyXL/zip.rb:10:in unzip' from /usr/local/lib/ruby/gems/1.9.1/gems/rubyXL-1.2.10/lib/rubyXL/parser.rb:326:indecompress’ from /usr/local/lib/ruby/gems/1.9.1/gems/rubyXL-1.2.10/lib/rubyXL/parser.rb:47:in `parse’ from (irb):4 from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/comma from /usr/local/lib/ruby/gems/1.9.1/gems/railties-3.2.11/lib/rails/comma

Do you have an idea what it might be? The file doesn’t seem corrupt, at least I can open it in microsoft excel.