autotest: No such file or directory - -u (Errno::ENOENT)

Hi there,

I currently can not get autottest to run:

loading autotest/rails /opt/local/bin/ruby -I.:lib:test -rubygems -e "%w[test/unit test/functional/home_controller_test.rb test/unit/helpers/home_helper_test.rb].each { |f| require f }" | unit_diff -u /opt/local/lib/ruby/gems/1.8/gems/ZenTest-4.1.4/lib/unit_diff.rb:70:in `gets': No such file or directory - -u (Errno::ENOENT)   from /opt/local/lib/ruby/gems/1.8/gems/ZenTest-4.1.4/lib/unit_diff.rb:70:in `parse_input'   from /opt/local/lib/ruby/gems/1.8/gems/ZenTest-4.1.4/lib/unit_diff.rb:182:in `unit_diff'   from /opt/local/lib/ruby/gems/1.8/gems/ZenTest-4.1.4/lib/unit_diff.rb:56:in `unit_diff'   from /opt/local/lib/ruby/gems/1.8/gems/ZenTest-4.1.4/bin/unit_diff:37   from /opt/local/bin/unit_diff:19:in `load'   from /opt/local/bin/unit_diff:19 /opt/local/lib/ruby/1.8/test/unit/ui/console/testrunner.rb:108:in `flush': Broken pipe (Errno::EPIPE)   from /opt/local/lib/ruby/1.8/test/unit/ui/console/testrunner.rb:108:in `output'   from /opt/local/lib/ruby/1.8/test/unit/ui/console/testrunner.rb:51:in `setup_mediator'   from /opt/local/lib/ruby/1.8/test/unit/ui/console/testrunner.rb:39:in `start'   from /opt/local/lib/ruby/1.8/test/unit/ui/testrunnerutilities.rb:29:in `run'   from /opt/local/lib/ruby/1.8/test/unit/autorunner.rb:216:in `run'   from /opt/local/lib/ruby/1.8/test/unit/autorunner.rb:12:in `run'   from /opt/local/lib/ruby/1.8/test/unit.rb:278   from -e:1

Envrionment:

ZenTest 4.1.4 MacOS Leopard - RUBYGEMS VERSION: 1.3.5 - RUBY VERSION: 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin9]

Anybody any idea what's wrong here?

Regards, Johannes