[Jython-users] Null pointer exception when instantiating Jython interpreter

[Robert O. <rob...@ho...>]

Hello,

I'm running NetBeans 3.34 with the Sun JDK/SDK version 1.4.1_01b, on a =
Win 2k box.  I'm trying to integrate Jython 2.1 into my test app.  I =
created a Frame where originally I tried starting the Jython interpreter =
when a button was hit.  I got the error dump shown below.  I did some =
Google searching and checked the Jython users mailing list archives, and =
saw some posts regarding Jython and multi-threading problems.  So I =
moved the code that tries to instantiate the jython interpreter into the =
static main() function that creates and shows the Frame.  Same error =
dump.  Does anyone know what to do here?

thx

-------------------------------------------------

Error Dump caused by line> PythonInterpreter interp =3D new =
PythonInterpreter():

java.lang.NullPointerException
        at
org.python.core.PyJavaClass.lookup(PyJavaClass.java:39)
        at
org.python.core.PyObject.<init>(PyObject.java:46)
        at
org.python.core.PySingleton.<init>(PySingleton.java:8)
        at
org.python.core.PyNone.<init>(PyNone.java:7)
        at
org.python.core.PySystemState.initStaticFields(PySystemState.java:34)
        at
org.python.core.PySystemState.initialize(PySystemState.java:320)
        at
org.python.core.PySystemState.initialize(PySystemState.java:294)
        at
org.python.core.PySystemState.initialize(PySystemState.java:287)
        at
org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:61)
        at
org.python.util.PythonInterpreter.<init>(PythonInterpreter.java:45)

       =20