Running irb...
load error: /Library/Ruby/Gems/2.0.0/gems/calabash-cucumber-0.20.0/scripts/.irbrc
NoMethodError: undefined method `strip' for nil:NilClass
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/version.rb:65:in `initialize'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:210:in `new'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:210:in `block (2 levels) in version'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:308:in `block in execute_command'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/open3.rb:217:in `popen_run'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/open3.rb:99:in `popen3'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:307:in `execute_command'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:208:in `block in version'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:212:in `call'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:212:in `version'
/Library/Ruby/Gems/2.0.0/gems/run_loop-2.2.0/lib/run_loop/xcode.rb:127:in `version_gte_8?'
/Library/Ruby/Gems/2.0.0/gems/calabash-cucumber-0.20.0/lib/calabash-cucumber/uia.rb:535:in `redefine_instance_methods_if_necessary'
/Library/Ruby/Gems/2.0.0/gems/calabash-cucumber-0.20.0/scripts/.irbrc:88:in `<top (required)>'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/irb/init.rb:236:in `load'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/irb/init.rb:236:in `run_config'
/System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/irb/init.rb:19:in `setup'
I have been struck with this issue.i could not launch my app.