building .app file using ant -- 2

I need help bundling my .jar into a Mac app. I am trying to do this using appbundler.jar. when I run ant from the directory that the build file is located in, I get the following error message. Any idea how to fix? /Users/caitlinfreeh/Desktop/build/[login to view URL]: [login to view URL] at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL](Native Method) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) at [login to view URL]([login to view URL]) Total time: 0 seconds