title: error of grails project from svn : GroovyObject cannot be resolved
body: <p>when i check out a new grails project from svn, i got some error:</p>
  
  <blockquote>
    <p>1.The project was not built since its build path is incomplete. Cannot find
    the class file for
    groovy.lang.GroovyObject. Fix the
    build path then try building this
    project</p>
    
    <p>2.The type groovy.lang.GroovyObject cannot be resolved. It is indirectly
    referenced from required .class files</p>
  </blockquote>
  
  <p>i had config the grails path, and it can run-app well.  but,still error warning.</p>
  
  <p><img src="https://i.stack.imgur.com/LMpU0.png" alt="alt text"></p>