Jdev human task addition error

Hi All,
I am trying to add a human task in a default project created in OIM. While I have defined a new task definition and all required task parameters, a null pointer exception is encountered when the task is attempted to be saved. I looked for similar issue on the forum and found few others have faced same problem but no solution has been recommended so far. Apologies I if overlooked any solution given already.
Uncaught exception
java.lang.NullPointerException
o.tip.tools.ide.bpel.v1.plugins.plugins.oracleext.graph.editors.workflow.GeneralTaskIOHandler.modifySwitchNode(GeneralTaskIOHandler.java:1090)
o.tip.tools.ide.bpel.v1.plugins.plugins.oracleext.graph.editors.workflow.GeneralTaskIOHandler.saveChanges(GeneralTaskIOHandler.java:400)
o.tip.tools.ide.bpel.v1.plugins.plugins.oracleext.graph.editors.workflow.NewWorkflowComponent.saveChanges(NewWorkflowComponent.java:369)
o.tip.tools.ide.bpel.v1.plugins.plugins.oracleext.graph.editors.workflow.GeneralTaskEditPage.saveChanges(GeneralTaskEditPage.java:98)
o.tip.tools.ide.bpel.v1.designer.graph.nodeeditors.framework.AbstractActivityNodeEditor$PanelManager.saveChanges(AbstractActivityNodeEditor.java:203)
o.tip.tools.ide.bpel.v1.plugins.plugins.oracleext.graph.nodeeditors.workflow.UserTaskPanelManager.saveChanges(UserTaskPanelManager.java:66)
o.tip.tools.ide.bpel.v1.designer.graph.nodeeditors.framework.ApplyCancelPanel.handleOK(ApplyCancelPanel.java:164)
o.tip.tools.ide.bpel.v1.designer.graph.nodeeditors.framework.ApplyCancelPanel.actionPerformed(ApplyCancelPanel.java:204)
jx.s.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
jx.s.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
jx.s.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
jx.s.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
jx.s.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
j.a.Component.processMouseEvent(Component.java:6289)
jx.s.JComponent.processMouseEvent(JComponent.java:3267)
j.a.Component.processEvent(Component.java:6054)
j.a.Container.processEvent(Container.java:2041)
j.a.Component.dispatchEventImpl(Component.java:4652)
j.a.Container.dispatchEventImpl(Container.java:2099)
j.a.Component.dispatchEvent(Component.java:4482)
j.a.LightweightDispatcher.retargetMouseEvent(Container.java:4577)
j.a.LightweightDispatcher.processMouseEvent(Container.java:4238)
j.a.LightweightDispatcher.dispatchEvent(Container.java:4168)
j.a.Container.dispatchEventImpl(Container.java:2085)
j.a.Window.dispatchEventImpl(Window.java:2478)
j.a.Component.dispatchEvent(Component.java:4482)
j.a.EventQueue.dispatchEventImpl(EventQueue.java:644)
j.a.EventQueue.access$000(EventQueue.java:85)
j.a.EventQueue$1.run(EventQueue.java:603)
j.a.EventQueue$1.run(EventQueue.java:601)
j.security.AccessController.doPrivileged(Native Method)
j.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
j.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:98)
j.a.EventQueue$2.run(EventQueue.java:617)
j.a.EventQueue$2.run(EventQueue.java:615)
j.security.AccessController.doPrivileged(Native Method)
j.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:87)
j.a.EventQueue.dispatchEvent(EventQueue.java:614)
j.a.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
j.a.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
j.a.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
j.a.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
j.a.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
j.a.EventDispatchThread.run(EventDispatchThread.java:122)
Appreciate your help!
Thanks.

Thanks Ravi for your response.
I observed something strange today! I was adding the human task, I talked about yesterday, in switch condition on 'Approve' response. But when I added the same human task outside switch condition, it worked just fine. Is placing a human task in switch condition not a supported configuration?
Use case: There are two levels of approver. Both the approver have different escalation critieria. In case of level 1 approver (beneficiary's manager), the task is required to be escalated to manager's manager. But in case of approver 2, no escalation is required.
Since escalation is defined at global level in a task, I decided to create two human tasks and insert second one on 'Approve' response of first task.
The second option that I am considering is - implement IDynamicTaskEscalationFunction interface to write a custom escalation java class and use it within same human task to skip escalations in case of approver 2 (not sure if this is possible, as I haven't implemented it before).

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    Seems you Human Task has run into not finding the input configurations you have made for the same.
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    Resolved ..
    It was an issue with permissions .
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