Message4207

here is the output of the two relevant lines (with echo on):

C:\stuff\jython\jython 2.5b2>if not defined _BOOT_CP set
CLASSPATH=C:\stuff\jython\jython 2.5b2\jython.jar;.;C:\Program
Files\Java\jre1.6.0_07\lib\ext\QTJava.zip

C:\stuff\jython\jython 2.5b2>"C:\Program Files\Java\jre6\bin\java" 
-Xss512k  -Dpython.home="C:\stuff\jython\jython 2.5b2"
-Dpython.executable="C:\stuff\jython\jython 2.5b2\jython.bat" -classpath
"C:\stuff\jython\jython 2.5b2\jython.jar;.;C:\Program
Files\Java\jre1.6.0_07\lib\ext\QTJava.zip" org.python.util.jython

quoting might not be perfect, but working.
So I would be glad to see a not working example.