我正在和＃34;在Heroku＆＃34;上开始使用Node.js，我想在那里＆＃34;在本地运行应用程序＆＃34;通过： $ foreman start web （参见https://devcenter.heroku.com/articles/getting-started-with-nodejs#run-the-app-locally）
它说：
/usr/local/foreman/lib/foreman/process.rb:54:in run': undefined method spawn＆＃39; for Process：Module（NoMethodError）
来自/usr/local/foreman/lib/foreman/process.rb:53:in chdir'
from /usr/local/foreman/lib/foreman/process.rb:53:in运行＆＃39;
来自/usr/local/foreman/lib/foreman/engine.rb:356:in spawn_processes'
from /usr/local/foreman/lib/foreman/engine.rb:353:in upto＆＃39;
来自/usr/local/foreman/lib/foreman/engine.rb:353:in spawn_processes'
from /usr/local/foreman/lib/foreman/engine.rb:352:in每个＆＃39;
来自/usr/local/foreman/lib/foreman/engine.rb:352:in spawn_processes'
from /usr/local/foreman/lib/foreman/engine.rb:57:in开始＆＃39;
来自/usr/local/foreman/lib/foreman/cli.rb:41:in start'
from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/command.rb:27:in 发送＆＃39;
来自/usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/command.rb:27:in run'
from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/invocation.rb:126:in invoke_command＆＃39;
来自/usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor.rb:359:in dispatch'
from /usr/local/foreman/vendor/gems/thor-0.19.1/lib/thor/base.rb:440:in开始＆＃39;
来自/ usr / bin / foreman：15
（在Mac OS 10.7.5上运行）
任何想法可能会有所帮助？谢谢！