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

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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.

Solutions on the web

via Oracle Community by user151917, 1 year ago
This exception has no message.
via Coderanch by Hocinema amir, 1 year ago
This exception has no message.
via Eclipse Bugzilla by davidc, 1 year ago
via knowcoding.com by Unknown author, 1 year ago
java.lang.NullPointerException:
at java.lang.Throwable.(Throwable.java:57)
at java.util.Hashtable.put(Hashtable.java:630)
at oracle.apps.xdo.template.fo.elements.FOLayoutMasterSet.addChild(FOLayoutMasterSet.java:61)
at oracle.apps.xdo.template.fo.elements.FOObject.init(FOObject.java:104)
at oracle.apps.xdo.template.fo.elements.FOSimplePageMaster.init(FOSimplePageMaster.java:90)
at java.util.Hashtable.put(Hashtable.java:630)
at oracle.apps.xdo.template.fo.elements.FOLayoutMasterSet.addChild(FOLayoutMasterSet.java:61)
at oracle.apps.xdo.template.fo.elements.FOObject.init(FOObject.java:104)
at oracle.apps.xdo.template.fo.elements.FOSimplePageMaster.init(FOSimplePageMaster.java:90)

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