I followed the three or four simple steps outlined in the instructions here: http://www.ericfeminella.com/blog/cairngen/
And I get... Buildfile: C:\inetpub\wwwroot\\cairngenTest\Cairngen 2.1\build.xml BUILD FAILED C:\inetpub\wwwroot\cairngenTest\Cairngen 2.1\build.xml:373: Unable to load a script engine manager (org.apache.bsf.BSFManager or javax.script.ScriptEngineManager) Anyone familiar?