I installed Groovy-1.8.4 using the window installer. I then launched the Groovy Console and typed in groovy -version, groovy -v, and groovysh and each time I get an exception error. I have my JAVA_HOME variable set, I have my GROOVY_HOME variable set, but the console cannot move past this issue. I can execute Math(16).sqrt, and println commands, etc.
Can someone tell me what to do to make sure that my installation of Groovy is working correctly? I am following "Progamming Groovy" book published by the Pragmatic Programmers.