From: "Mattias A." Date: 2013-01-07T20:27:09+09:00 Subject: error running onStopped callback Hi, Do anybody know why below error message spits out in my cmd window? Thanks in advance! :) !!! error running onStopped callback: TypeError: callback is not a function *** LOG addons.manager: shutdown *** LOG addons.xpi: shutdown -Script- require 'rubygems' require 'selenium-webdriver' driver = Selenium::WebDriver.for :firefox driver.get "http://google.com" element = driver.find_element name: 'q' element.send_keys "Cheese!" element.submit puts "Page title is #{driver.title}" wait = Selenium::WebDriver::Wait.new(:timeout => 10) wait.until { driver.title.downcase.start_with? "cheese!" } puts "Page title is #{driver.title}" driver.quit -Result- Page title is Google Page title is cheese! - Google Search !!! error running onStopped callback: TypeError: callback is not a function *** LOG addons.manager: shutdown *** LOG addons.xpi: shutdown -- Posted via http://www.ruby-forum.com/.