Old Rails app: can't find file_column gem?

Hi all

I’m trying to get some old Rails app to work. But when trying to start
it, I get the following error:

josh$ script/server
=> Booting WEBrick…
./script/…/config/…/config/environment.rb:5: warning: already
initialized constant RAILS_ENV
/Library/Ruby/Site/1.8/rubygems/custom_require.rb:27:in
gem_original_require': no such file to load -- file_column (MissingSourceFile) from /Library/Ruby/Site/1.8/rubygems/custom_require.rb:27:inrequire’
from
./script/…/config/…/vendor/rails/activesupport/lib/active_support/dependencies.rb:147:in
require' from script/../config/../vendor/plugins/file_column/init.rb:5:inload_plugin’
from
./script/…/config/…/vendor/rails/railties/lib/initializer.rb:348:in
load_plugin' from ./script/../config/../vendor/rails/activesupport/lib/active_support/core_ext/kernel/reporting.rb:11:insilence_warnings’
from
./script/…/config/…/vendor/rails/railties/lib/initializer.rb:348:in
load_plugin' from ./script/../config/../vendor/rails/railties/lib/initializer.rb:158:inload_plugins’
from
./script/…/config/…/vendor/rails/railties/lib/initializer.rb:158:in
each' ... 11 levels... from ./script/../config/../vendor/rails/activesupport/lib/active_support/dependencies.rb:147:inrequire’
from
./script/…/config/…/vendor/rails/railties/lib/commands/server.rb:30
from script/server:3:in `require’
from script/server:3

But I do have the file_column plugin in the vendor/plugins directory! So
why is it looking for a gem?

Thanks
Josh

Could it be that I need to install RMagick? Might that be the case?