NPE when trying to load wadl using soapUI-pro-3.5.1

 Copying the NPE stack trace, any idea why it might be failing in attachmentUtils?

    java.lang.NullPointerException
  at com.eviware.soapui.impl.wsdl.submit.transports.http.support.attachments.AttachmentUtils.isSwaRefType(AttachmentUtils.java:368)
  at com.eviware.soapui.support.editor.views.xml.form2.components.SingleContentEditorComponent.a(SourceFile:72)
  at com.eviware.soapui.support.editor.views.xml.form2.components.SingleContentEditorComponent.getComponent(SourceFile:42)
  at com.eviware.soapui.support.editor.views.xml.form2.components.AbstractEditorComponent.addEditorToForm(SourceFile:221)
  at com.eviware.soapui.support.editor.views.xml.form2.components.SequenceEditorComponent.a(SourceFile:48)
  at com.eviware.soapui.support.editor.views.xml.form2.components.SequenceEditorComponent.(SourceFile:29)
  at com.eviware.soapui.support.editor.views.xml.form2.EditorComponentFactory.a(SourceFile:49)
  at com.eviware.soapui.support.editor.views.xml.form2.EditorComponentFactory.buildEditorComponent(SourceFile:34)
  at com.eviware.soapui.support.editor.views.xml.form2.EditorComponentFactory.buildEditorComponent(SourceFile:14)
  at com.eviware.soapui.support.editor.views.xml.form2.FormEditorView.a(SourceFile:173)
  at com.eviware.soapui.support.editor.views.xml.form2.FormEditorView.activate(SourceFile:138)
  at com.eviware.soapui.support.editor.Editor$InputTabsChangeListener.stateChanged(Editor.java:220)
  at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:400)
  at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:253)
  at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:116)
  at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:50)
  at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:599)
  at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:574)
  at com.eviware.soapui.support.editor.Editor.selectView(Editor.java:96)
  at com.eviware.soapui.impl.rest.panels.request.ProRestRequestPanelBuilder.buildDesktopPanel(SourceFile:19)
  at com.eviware.soapui.impl.rest.panels.request.ProRestRequestPanelBuilder.buildDesktopPanel(SourceFile:11)
  at com.eviware.soapui.ui.TabbedSoapUIDesktop.showDesktopPanel(SourceFile:211)
  at com.eviware.soapui.support.UISupport.showDesktopPanel(UISupport.java:567)
  at com.eviware.soapui.support.UISupport.selectAndShow(UISupport.java:555)
  at com.eviware.soapui.impl.wsdl.actions.support.ShowDesktopPanelAction.perform(ShowDesktopPanelAction.java:53)
  at com.eviware.soapui.support.action.swing.SwingActionDelegate.actionPerformed(SwingActionDelegate.java:104)
  at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2028)
  at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2351)
  at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
  at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
  at javax.swing.AbstractButton.doClick(AbstractButton.java:389)
  at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:1223)
  at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:1264)
  at java.awt.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
  at java.awt.Component.processMouseEvent(Component.java:6348)
  at javax.swing.JComponent.processMouseEvent(JComponent.java:3255)
  at java.awt.Component.processEvent(Component.java:6113)
  at java.awt.Container.processEvent(Container.java:2085)
  at java.awt.Component.dispatchEventImpl(Component.java:4714)
  at java.awt.Container.dispatchEventImpl(Container.java:2143)
  at java.awt.Component.dispatchEvent(Component.java:4544)
  at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4618)
  at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4282)
  at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4212)
  at java.awt.Container.dispatchEventImpl(Container.java:2129)
  at java.awt.Component.dispatchEvent(Component.java:4544)
  at java.awt.EventQueue.dispatchEvent(EventQueue.java:635)
  at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
  at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
  at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
  at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
  at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)