NPE trying to add an assertion on a HTTP request

Hi all,

I'm using SoapUI 5.2.1 to create a test case about HTTP requests.

When trying to add assertion on a HTTP request of my test case, I get the following NullPointerException in the xterm where I had started SoapUI. The NPE occurs when clicking on a assertion category (left part of the dialog box "Add assertion").

This problem occurs also with SoapUI 5.2.0.

Env: Ubuntu 15.10 64bits, Java 7u91-2.6.3-0ubuntu0.15.10.1

Thanks for your help.

Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
    at com.eviware.soapui.impl.wsdl.panels.assertions.AddAssertionPanel$CategoryListRenderer.getTableCellRendererComponent(AddAssertionPanel.java:473)
    at javax.swing.JTable$AccessibleJTable.getAccessibleChild(JTable.java:7044)
    at javax.swing.JTable$AccessibleJTable.getAccessibleAt(JTable.java:7431)
    at javax.swing.JTable$AccessibleJTable.valueChanged(JTable.java:6946)
    at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:184)
    at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:164)
    at javax.swing.DefaultListSelectionModel.fireValueChanged(DefaultListSelectionModel.java:211)
    at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:405)
    at javax.swing.DefaultListSelectionModel.changeSelection(DefaultListSelectionModel.java:415)
    at javax.swing.DefaultListSelectionModel.setSelectionInterval(DefaultListSelectionModel.java:459)

    ....