Test step cannot open

Hello,

With SoapUI 5.0.0, when I try to open one of the test step in the editor it doesn't open and I have following error log:

Tue Sep 30 13:43:09 EDT 2014:ERROR:java.lang.NullPointerException
java.lang.NullPointerException
at java.util.regex.Matcher.appendReplacement(Unknown Source)
at java.util.regex.Matcher.replaceAll(Unknown Source)
at java.lang.String.replaceAll(Unknown Source)
at com.eviware.soapui.impl.rest.support.RestUtils.expandPath(RestUtils.java:257)
at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.updateFullPathLabel(RestTestRequestDesktopPanel.java:222)
at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.addBottomToolbar(RestTestRequestDesktopPanel.java:204)
at com.eviware.soapui.impl.rest.panels.request.AbstractRestRequestDesktopPanel.buildToolbar(AbstractRestRequestDesktopPanel.java:146)
at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.init(AbstractHttpRequestDesktopPanel.java:184)
at com.eviware.soapui.impl.support.panels.AbstractHttpRequestDesktopPanel.<init>(AbstractHttpRequestDesktopPanel.java:129)
at com.eviware.soapui.impl.support.panels.AbstractHttpXmlRequestDesktopPanel.<init>(AbstractHttpXmlRequestDesktopPanel.java:45)
at com.eviware.soapui.impl.rest.panels.request.AbstractRestRequestDesktopPanel.<init>(AbstractRestRequestDesktopPanel.java:61)
at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestDesktopPanel.<init>(RestTestRequestDesktopPanel.java:85)
at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestPanelBuilder.buildDesktopPanel(RestTestRequestPanelBuilder.java:41)
at com.eviware.soapui.impl.wsdl.panels.teststeps.RestTestRequestPanelBuilder.buildDesktopPanel(RestTestRequestPanelBuilder.java:33)
at com.eviware.soapui.ui.desktop.standalone.StandaloneDesktop.showDesktopPanel(StandaloneDesktop.java:204)
at com.eviware.soapui.support.UISupport.showDesktopPanel(UISupport.java:587)
at com.eviware.soapui.support.UISupport.selectAndShow(UISupport.java:575)
at com.eviware.soapui.impl.wsdl.actions.support.ShowDesktopPanelAction.perform(ShowDesktopPanelAction.java:57)
at com.eviware.soapui.support.action.swing.SwingActionDelegate.actionPerformed(SwingActionDelegate.java:93)
at com.eviware.soapui.support.action.swing.DefaultActionList.performDefaultAction(DefaultActionList.java:111)
at com.eviware.soapui.ui.Navigator$TreeMouseListener$1.run(Navigator.java:412)
at java.awt.event.InvocationEvent.dispatch(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$200(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

Can you help?
Regards,