Hello, This post pertains to: http://drmaa4ruby.sunsource.net/ I'm a drmaa4ruby user, and I recently upgraded to Ruby 1.9.1. I noticed that the DL library changed (dlopen only uses one parameter now), and I tried to remedy the issue, but I really couldn't find much help on using it through Google. I'm also new to Ruby. I created a workaround with the assistance of FFI library for Ruby (only finished functions that I used for my web app) and I just recently uploaded it to Github if you're interested in quickly looking at the code. http://github.com/jeremy04/drmaa4ruby-1.9 Thanks, Jeremy Lipson