java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.bea.plateng.domain.assignment.JDBCPoolJMSJDBCStoreAssignment.createSourceTree(JDBCPoolJMSJDBCStoreAssignment.java:61)
at com.bea.plateng.domain.assignment.AssignmentTree.buildModel(AssignmentTree.java:335)
at com.bea.plateng.domain.assignment.AssignmentTreeDefinition.createAssignment(AssignmentTreeDefinition.java:302)
at com.bea.plateng.domain.DomainTemplate.getAssignment(DomainTemplate.java:923)
at com.bea.plateng.domain.event.assignment.JMSServerServerAssignmentListener.getJDBCConnectionPool(JMSServerServerAssignmentListener.java:107)
at com.bea.plateng.domain.event.assignment.JMSServerServerAssignmentListener.doAssign(JMSServerServerAssignmentListener.java:50)
at com.bea.plateng.domain.event.assignment.AssignmentTreeListener.vetoableChange(AssignmentTreeListener.java:77)
at com.bea.plateng.common.comdev.MVetoableChangeSupport.fireVetoableChange(MVetoableChangeSupport.java:188)
at com.bea.plateng.common.comdev.MVetoableChangeSupport.fireVetoableChange(MVetoableChangeSupport.java:155)
at com.bea.plateng.common.comdev.MVetoableChangeSupport.fireVetoableChange(MVetoableChangeSupport.java:138)
at com.bea.plateng.common.comdev.TreeDataModel.setAttribute(TreeDataModel.java:191)
at com.bea.plateng.domain.assignment.AssignmentTree$SetInitialSelectionVisitor.visitTree(AssignmentTree.java:1020)
at com.bea.plateng.common.comdev.TreeVisitor.visit(TreeVisitor.java:24)
at com.bea.plateng.common.comdev.PreOrder.preVisit(PreOrder.java:34)
at com.bea.plateng.common.comdev.TreeHelper.depthFirstTraversal(TreeHelper.java:42)
at com.bea.plateng.common.comdev.TreeHelper.depthFirstTraversal(TreeHelper.java:47)
at com.bea.plateng.common.comdev.GeneralTree.accept(GeneralTree.java:220)
at com.bea.plateng.domain.assignment.AssignmentTree.buildModel(AssignmentTree.java:359)
at com.bea.plateng.domain.assignment.AssignmentTreeDefinition.createAssignment(AssignmentTreeDefinition.java:302)
at com.bea.plateng.domain.DomainTemplate.getAssignment(DomainTemplate.java:923)
at com.bea.plateng.domain.DomainChecker.syncAssignments(DomainChecker.java:223)
at com.bea.plateng.domain.TemplateExtensionHelper.processAddedExtension(TemplateExtensionHelper.java:112)
at com.bea.plateng.domain.DomainTemplate.addApplicationTemplate(DomainTemplate.java:797)
at com.bea.plateng.domain.script.ScriptExecutor.addTemplate(ScriptExecutor.java:435)
at com.bea.plateng.domain.script.ScriptParser$StateMachine.processAdd(ScriptParser.java:881)
at com.bea.plateng.domain.script.ScriptParser$StateMachine.execute(ScriptParser.java:463)
at com.bea.plateng.domain.script.ScriptParser.parseAndRun(ScriptParser.java:171)
at com.bea.plateng.domain.script.ScriptParser.execute(ScriptParser.java:134)
at com.bea.plateng.domain.script.ScriptParser.execute(ScriptParser.java:98)
at com.bea.plateng.wizard.domain.silent.tasks.RunScriptTask.execute(RunScriptTask.java:214)
at com.bea.plateng.wizard.silent.tasks.AbstractSilentTask.run(AbstractSilentTask.java:32)
at java.lang.Thread.run(Thread.java:536)

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