500 Servlet Exception

/im/breadcrumbs.jsp:1: error: cannot find symbol
     if (sourceLang.equals("fr")){ 
         ^
  symbol:   variable sourceLang
  location: class _index__jsp
/im/breadcrumbs.jsp:8: error: cannot find symbol
    out.print(( categoryInterface.getHomeUrl() ));
                ^
  symbol:   variable categoryInterface
  location: class _index__jsp
/im/breadcrumbs.jsp:8: error: cannot find symbol
    out.print(( categoryInterface.getVocabularyUrl() ));
                ^
  symbol:   variable categoryInterface
  location: class _index__jsp
/im/breadcrumbs.jsp:8: error: cannot find symbol
    out.print(( categoryInterface.getVocabularyTitleLong() ));
                ^
  symbol:   variable categoryInterface
  location: class _index__jsp
4 errors


Resin/4.0.66 Server: 'app-0'