ADFC-02013: The ADF Controller cannot find metadata for activity ...

Sometime we run into the following issue

 <Error> <oracle.webcenter.webcenterapp.internal.view.webapp> <BEA-000000> <
oracle.adf.controller.activity.ActivityLogicException: ADFC-02013: The ADF Controller cannot find metadata for activity '/extend/webcenter/doclib/view/jsf/taskf
lows/folderViewer/folderView.xml#doclib-folder-viewer@initFolderViewer'.
        at oracle.adfinternal.controller.util.Utils.createAndLogActivityLogicException(Utils.java:230)
        at oracle.adfinternal.controller.engine.ControlFlowEngine.doRouting(ControlFlowEngine.java:1003)
        at oracle.adfinternal.controller.engine.ControlFlowEngine.doRouting(ControlFlowEngine.java:853)
        at oracle.adfinternal.controller.engine.ControlFlowEngine.invokeTaskFlow(ControlFlowEngine.java:245)
        at oracle.adfinternal.controller.state.ChildViewPortContextImpl.invokeTaskFlow(ChildViewPortContextImpl.java:104)
        at oracle.adfinternal.controller.state.ControllerState.createChildViewPort(ControllerState.java:1519)
        at oracle.adfinternal.controller.ControllerContextImpl.createChildViewPort(ControllerContextImpl.java:88)
        at oracle.adf.controller.internal.binding.TaskFlowRegionModelViewPort.createRegionViewPortContext(TaskFlowRegionModelViewPort.java:762)
        at oracle.adf.controller.internal.binding.TaskFlowRegionModelViewPort.getViewPort(TaskFlowRegionModelViewPort.java:607)

Solution

1. Make sure that the method where the metadata is failing has the fixed outcome property set in the taskflow as shown below

2. Also there should be no errors and warnings (Yes warning should also be not there) should not be there for that method in the taskflow