java.lang.NullPointerException
   at org.netbeans.modules.project.ui.zip.ExportZIP.scanForFiles(ExportZIP.java:200)
   at org.netbeans.modules.project.ui.zip.ExportZIP.build(ExportZIP.java:169)
   at org.netbeans.modules.project.ui.zip.ExportZIP.access$500(ExportZIP.java:99)
   at org.netbeans.modules.project.ui.zip.ExportZIP$ExportZIPAction$2.run(ExportZIP.java:132)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1443)
   at org.netbeans.modules.openide.util.GlobalLookup.execute(GlobalLookup.java:68)
   at org.openide.util.lookup.Lookups.executeWith(Lookups.java:303)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2058)