[Soot-list] Beginner's question: Making tutorial/guide/examples/call_graph example work

[Michal Young]

I am new to Soot, and trying to use the examples distributed with the  
tutorial as a gentle introduction to the API (along with the supplied  
documentation, of course).   Unfortunately I seem to be doing  
something very basic wrong, because the provided example tutorial/ 
guide/examples/call_graph is not working for me --- the classfile  
java.lang.Object is not being found even though it is on $CLASSPATH.

My environment:
     java soot.Main says:  Soot version 2.2.3
     'uname -a' says:  SunOS ix 5.9 Generic_118558-38 sun4u sparc  
SUNW,Sun-Fire-280R
     java -version says: Java(TM) 2 Runtime Environment, Standard  
Edition (build 1.4.0_00-b05)
                                        Java HotSpot(TM) Client VM  
(build 1.4.0_00-b05, mixed mode)
     CLASSPATH includes soot/classes,  polyglot-1.3.4/classes,  
jasmin-2708/classes and the accompanying
	  cup-classes, and (most relevant, I think) /usr/java/jre/lib/rt.jar

The classfile java.lang.Object does seem to be on the classpath:
      bash-2.05$ jar tf /usr/java/jre/lib/rt.jar | egrep "lang/Object"
      java/lang/Object.class

soot.Main run from the command line does seem to be able to build and  
use a call graph.

And yet ... when I try to run the example from the tutorial guide ...

bash-2.05$ java dk.brics.soot.callgraphs.CallGraphExample
Exception in thread "main" java.lang.RuntimeException:
Aborting: can't find classfile java.lang.Object
         at soot.Scene.getSootClass(Scene.java:381)
         at soot.javaToJimple.ClassResolver.createClassDecl 
(ClassResolver.java:86)
         at soot.javaToJimple.ClassResolver.createSource 
(ClassResolver.java:751)
         at soot.javaToJimple.InitialResolver.resolveFromJavaFile 
(InitialResolver.java:179)
         at soot.JavaClassSource.resolve(JavaClassSource.java:49)
         at soot.SootResolver.bringToHierarchy(SootResolver.java:148)
         at soot.SootResolver.bringToSignatures(SootResolver.java:172)
         at soot.SootResolver.bringToBodies(SootResolver.java:214)
         at soot.SootResolver.processResolveWorklist 
(SootResolver.java:100)
         at soot.SootResolver.resolveClass(SootResolver.java:89)
         at soot.Scene.loadClass(Scene.java:336)
         at soot.Scene.loadClassAndSupport(Scene.java:321)
         at dk.brics.soot.callgraphs.CallGraphExample.main 
(CallGraphExample.java:18)

Hints?

Thanks,
--Michal