Error when build J2EE example - web

I use ANT 1.4.1 in C:\ANT directory and set up all environment variables ANT_HOME, JAVA_HOME etc
When I do a build on the "web example as following:
ant web
I got the following error:
BUILD FAILED
java.lang.NullPointerException
at org.apache.tools.ant.taskdefs.Property.loadEnvironment(Property.java:
253)
at org.apache.tools.ant.taskdefs.Property.execute(Property.java:183)
at org.apache.tools.ant.Task.perform(Task.java:217)
at org.apache.tools.ant.Target.execute(Target.java:184)
at org.apache.tools.ant.Target.performTasks(Target.java:202)
at org.apache.tools.ant.Project.executeTarget(Project.java:601)
at org.apache.tools.ant.Project.executeTargets(Project.java:560)
at org.apache.tools.ant.Main.runBuild(Main.java:454)
at org.apache.tools.ant.Main.start(Main.java:153)
at org.apache.tools.ant.Main.main(Main.java:176)
Any suggestion. Appreciate your help
Tom

Are you running ant in the <j2eetutorial_home>\examples directory> ?J2eetutorial_home refers to the directory where the tutorial is installed. I don't think this is the problem, but I thought i might check.

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0
down vote
favorite
I am working on a WPF app that I want to create for Windows 8. I followed steps mentioned in
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