Problem instantiating a delegate class

[tmk]

Hi,

I have a small processdefinition which calls a ActionHandler when entering a transition:

<?xml version="1.0" encoding="UTF-8"?>

<process-definition xmlns="urn:jbpm.org:jpdl-3.2" name="TransportProcessDef">
 <start-state name="start">
 <transition name="" to="state1">
 <action class="com.xxx.man.MyAction" name="Doing some complex things"></action>
 </transition>
 </start-state>
 <state name="state1">
 <transition name="toEnd1" to="end1"></transition>
 </state>
 <end-state name="end1"></end-state>
</process-definition>

When I run the process, I get the following exception:

ERROR [org.jbpm.instantiation.Delegation] couldn't instantiate delegation class 'com.ptvag.jabba.tourmgmt.MyAction'
java.lang.NullPointerException...

I don't understand this behaviour, because I can instantiate an object of the Class MyAction with a Classloader without any problem:

Class clazz = c.loadClass("com.xxx.man.MyAction");
MyAction a = (MyAction) clazz.newInstance();
a.execute(null);

Can anybody help me with this problem? Thanks in advance!

Regards,
TMK

[kukeltje]

where does your test code run? most of the time this is a classloader issue

[tmk]

The code runs in an EJB which is deployed on a JBoss server.

[tmk]

Perhaps I should mention that it is an EJB2 and not EJB3.0. Are there general problems with jBPM and EJB2?

[tmk]

Solved the problem:
Deleted the
<loader-repository>
tag of my jboss-app.xml.