From: Masaki Suketa Date: 2012-08-06T18:46:05+09:00 Subject: [ruby-core:47017] Re: [ruby-trunk - Bug #6829][Feedback] Failure using Win32ole (happens in 1.8.7 and 1.9 Thank you for your reporting. I'm not sure, but maybe you must specify variant type information of arguments when you call PrintPostageEx. I'd like to know what variant type of arguments is needed to call PrintPostageEx. What is the result of the following code in Ruby 1.9? method = internet_postage.ole_method("PrintPostageEx") method.params.each do |param| puts param.name + ":" + param.ole_type_detail.join(',') end Best Regards, Masaki Suketa