Roger Pack wrote: > What's the full output? Do you have 32 bit versions of tk and ruby > installed, I assume? > -rp I have ActiveState Active Tcl8.4.19.1 installed, along with Ruby 1.9.1p378 (2010-01-10 revision 26273) [i386-mingw32]. Ruby is working fine with my other apps, and the Active Tcl is working fine with my TK apps if I run them under Ruby 1.8.6. Ruby 1.9 is my default installation (confirmed by ruby -v). When I type gem install tk_as_gem I get: 'Building native extensions. This could take a while... ERROR: Error installing tk_as_gem: ERROR: Failed to build gem native extension. C:/Ruby19/bin/ruby.exe extconf.rb Gem files will remain installed in C:/Ruby19/lib/ruby/gems/1.9.1/gems/tk_as_gem-0.1.0 for inspection. Results logged to C:/Ruby19/lib/ruby/gems/1.9.1/gems/tk_as_gem-0.1.0/gem_make.out' The contents of the gem_make.out file are just 'C:/Ruby19/bin/ruby.exe extconf.rb' I do have devkit in the Ruby19 directory, along with the appropriate /bin stuff from devkit. Other gems install fine. I currently have fxruby and RMagick gems installed and they are working fine. My gem environment is 1.3.6. --Alex -- Posted via http://www.ruby-forum.com/.