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    Thrown when an application is trying to use or access an object whose reference equals to null. You are probably trying to use a reference that points to no location in memory as though it were referencing an object.

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java.lang.NullPointerException: 	at java.util.Hashtable.put(Hashtable.java:380)	at oracle.cabo.ui.data.DictionaryData.put(Unknown Source)	at oracle.sysman.eml.ias.oc4j.DeployWiz.displayDataBindingException(DeployWiz.java:2249)	at oracle.sysman.eml.ias.oc4j.DeployWiz.getWebModulesURLMapping(DeployWiz.java:645)	at java.lang.reflect.Method.invoke(Native Method)	at oracle.cabo.ui.data.provider.MethodDataProvider.getDataObject(Unknown Source)