javac cent exception

When I run centipede (from latest in CVS, on Linux, on JDK j2sdk1.4.0_03)
from Gump I get this exception. When I run from the command line I don't
have a problem.
Looking at this line of code in ANT source I see:
    private static boolean doesModernCompilerExist() {
        try {
            Class.forName("com.sun.tools.javac.Main");
            return true;
        } catch (ClassNotFoundException cnfe) {
            try {
                CompilerAdapterFactory.class.getClassLoader().loadClass(
"com.sun.tools.javac.Main" );
                return true;
            } catch (ClassNotFoundException cnfe2) {
            }
        }
        return false;
    }

So I assume com.sun.tools.javac.Main is not found.
In my gump running script I know I export this (per Nick), see:
	declare -x CLASSPATH="/usr/java/j2sdk1.4.0_03/lib/tools.jar"
and:
	jar tvf /usr/java/j2sdk1.4.0_03/lib/tools.jar | grep -i javac
shows:
	   520 Fri Nov 01 23:01:36 MST 2002 com/sun/tools/javac/Main.class
.. so I beleive it starts out in my classpath, so I can't understand. I
*used* to be able to get ant inside centipede to work inside gump, on this
configuration of OS/JDK, so am I somehow corrupting the classpath, or is it
someithing in recent cent or ?????
All suggestions appreciated.
regards,
Adam
----------------------------------------------------------------------------
----------------

Total time: 13 seconds java.lang.NullPointerException at
org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.doesModernCom
pilerExist(CompilerAdapterFactory.java:177) at
org.apache.tools.ant.taskdefs.compilers.CompilerAdapterFactory.getCompiler(C
ompilerAdapterFactory.java:131) at
org.apache.tools.ant.taskdefs.Javac.compile(Javac.java:834) at
org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:681) at
org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:185) at
org.apache.tools.ant.Task.perform(Task.java:348) at
org.apache.tools.ant.Target.execute(Target.java:309) at
org.apache.tools.ant.Target.performTasks(Target.java:336) at
org.apache.tools.ant.Project.executeTarget(Project.java:1244) at
org.apache.tools.ant.Project.executeTargets(Project.java:1188) at
org.apache.tools.ant.Main.runBuild(Main.java:614) at
org.apache.tools.ant.Main.start(Main.java:197) at
org.apache.tools.ant.Main.main(Main.java:235)


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