Hi,
Please advise how to fix this issue. I get following error message when I do a "Test XSLT Map" operation on the XSLT designer view on Oracle JDev 12c. I pasted the error message and the logs below.
Error Message:

JDEV logs:
Apr 03, 2018 11:21:30 AM oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator generateInstance
SEVERE: Error occurred while generating the sample instance.
null
oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerationException: Error occurred while generating the sample instance.
null
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.generateInstance(InstanceGenerator.java:366)
at oracle.tip.tools.ide.tx_multi.test.MapTestUtils.generateInstance(MapTestUtils.java:179)
at oracle.tip.tools.ide.tx_multi.test.MapperTester.generateSource(MapperTester.java:428)
at oracle.tip.tools.ide.tx_multi.test.MapperTester.doTest(MapperTester.java:347)
at oracle.tip.tools.ide.tx_multi.test.MapperTester.test(MapperTester.java:160)
at oracle.tip.tools.ide.tx_multi.gui.assign.panel.MapPanel$24$2.actionPerformed(MapPanel.java:1218)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:833)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:877)
at java.awt.Component.processMouseEvent(Component.java:6533)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
at java.awt.Component.processEvent(Component.java:6298)
at java.awt.Container.processEvent(Container.java:2236)
at java.awt.Component.dispatchEventImpl(Component.java:4889)
at java.awt.Container.dispatchEventImpl(Container.java:2294)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4888)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4525)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4466)
at java.awt.Container.dispatchEventImpl(Container.java:2280)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4711)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:758)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:86)
at java.awt.EventQueue$4.run(EventQueue.java:731)
at java.awt.EventQueue$4.run(EventQueue.java:729)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:728)
at oracle.javatools.internal.ui.EventQueueWrapper._dispatchEvent(EventQueueWrapper.java:169)
at oracle.javatools.internal.ui.EventQueueWrapper.dispatchEvent(EventQueueWrapper.java:151)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Caused by: java.lang.NullPointerException
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.applyFacets(InstanceGenerator.java:1250)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.getValue(InstanceGenerator.java:1133)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createValue(InstanceGenerator.java:1002)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForType(InstanceGenerator.java:547)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForElement(InstanceGenerator.java:663)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForGroup(InstanceGenerator.java:626)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForType(InstanceGenerator.java:523)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForElement(InstanceGenerator.java:663)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForGroup(InstanceGenerator.java:626)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.createInstanceForType(InstanceGenerator.java:523)
at oracle.tip.tools.ide.utils.xml.generator.instance.InstanceGenerator.generateInstance(InstanceGenerator.java:344)
... 45 more