npe in simple piper fabricator gui

From David Kincaid:

I'm getting a NullPointerException while trying to launch the Piper Creator GUI from a Linux command line. I have Ubuntu Linux 16.10 and using Oracle JVM 1.8.0_131. Here is the stacktrace I get when I run bin/runPiperCreator.sh from the cTAKES 4.0 root:

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at
javax.swing.plaf.synth.SynthTableHeaderUI$HeaderRenderer.getTableCellRendererComponent(SynthTableHeaderUI.java:234)
at
org.apache.ctakes.gui.pipeline.MainPanel2.createWestPanel(MainPanel2.java:94)