I just upgraded from Eclipse 3.0 to 3.1.1. However, when running XDoclet on any of my projects (which were working with 3.0 version), I get:

java.lang.NullPointerException
at org.jboss.ide.eclipse.xdoclet.run.util.ProjectUtil.populateClassPath(ProjectUtil.java:62)
at org.jboss.ide.eclipse.xdoclet.run.util.AntUtil.getClassPathAsXml(AntUtil.java:46)
at org.jboss.ide.eclipse.xdoclet.run.XDocletRunPlugin.createBuildFile(XDocletRunPlugin.java:174)
at org.jboss.ide.eclipse.xdoclet.run.ui.actions.XDocletRunAction$1.run(XDocletRunAction.java:157)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:76)

What is causing this?

- Javed