java.lang.NullPointerException
        at com.sun.portal.portletcontainer.admin.PortletRegistryGenerator.createPortletRegistryElements(PortletRegistryGenerator.java:222)
        at com.sun.portal.portletcontainer.admin.PortletRegistryGenerator.register(PortletRegistryGenerator.java:180)
        at com.sun.portal.portletcontainer.admin.mbeans.PortletAdmin.registerPortlet(PortletAdmin.java:92)
        at com.sun.portal.portletcontainer.admin.mbeans.PortletAdmin.deploy(PortletAdmin.java:119)
        at com.sun.portal.portletcontainer.admin.mbeans.PortletAdmin.deploy(PortletAdmin.java:103)
Caused: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
Caused: java.lang.Exception: null
Please do a "clean and build" and try again !!!
        at org.netbeans.modules.portalpack.servers.jnpc.pc20.PC20TaskHandler._deployOnPC(PC20TaskHandler.java:64)
        at org.netbeans.modules.portalpack.servers.jnpc.impl.JNPCTaskHandler.deploy(JNPCTaskHandler.java:90)
        at org.netbeans.modules.portalpack.servers.core.PSDeployerImpl.run(PSDeployerImpl.java:151)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)