java.lang.NullPointerException: Must pass non-null build script
        at org.apache.tools.ant.module.api.support.ActionUtils.runTarget(ActionUtils.java:81)
        at org.netbeans.modules.websvc.spi.jaxws.client.ProjectJAXWSClientSupport$2.run(ProjectJAXWSClientSupport.java:242)
        at org.netbeans.modules.websvc.spi.jaxws.client.ProjectJAXWSClientSupport$2.run(ProjectJAXWSClientSupport.java:241)
        at org.openide.util.Mutex.readAccess(Mutex.java:291)
        at org.netbeans.modules.websvc.spi.jaxws.client.ProjectJAXWSClientSupport.runWsimport(ProjectJAXWSClientSupport.java:240)
        at org.netbeans.modules.websvc.spi.jaxws.client.ProjectJAXWSClientSupport.access$100(ProjectJAXWSClientSupport.java:84)
        at org.netbeans.modules.websvc.spi.jaxws.client.ProjectJAXWSClientSupport$1.modelCreated(ProjectJAXWSClientSupport.java:221)
        at org.netbeans.modules.websvc.api.jaxws.wsdlmodel.WsdlModeler.fireModelCreated(WsdlModeler.java:265)
        at org.netbeans.modules.websvc.api.jaxws.wsdlmodel.WsdlModeler.access$200(WsdlModeler.java:72)
        at org.netbeans.modules.websvc.api.jaxws.wsdlmodel.WsdlModeler$1.run(WsdlModeler.java:98)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)