java.lang.IllegalArgumentException: fileObject == null
        at org.netbeans.api.java.source.JavaSource.forFileObject(JavaSource.java:409)
        at org.netbeans.modules.websvc.rest.nodes.OpenCookieFactory$OpenCookieImpl.<init>(OpenCookieFactory.java:92)
        at org.netbeans.modules.websvc.rest.nodes.OpenCookieFactory.create(OpenCookieFactory.java:71)
        at org.netbeans.modules.websvc.rest.nodes.OpenCookieFactory.create(OpenCookieFactory.java:63)
        at org.netbeans.modules.websvc.rest.nodes.RestServiceNode.<init>(RestServiceNode.java:80)
        at org.netbeans.modules.websvc.rest.nodes.RestServiceNode.<init>(RestServiceNode.java:68)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren$5.run(RestServicesChildren.java:165)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren$5.run(RestServicesChildren.java:160)
        at org.netbeans.modules.websvc.rest.model.impl.RestServicesMetadataModelImpl$1.call(RestServicesMetadataModelImpl.java:76)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runCallable(AnnotationModelHelper.java:247)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.access$100(AnnotationModelHelper.java:82)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:183)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper$2.run(AnnotationModelHelper.java:185)
        at org.netbeans.api.java.source.JavaSource.runUserActionTaskImpl(JavaSource.java:680)
        at org.netbeans.api.java.source.JavaSource.runUserActionTask(JavaSource.java:607)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:181)
        at org.netbeans.modules.j2ee.metadata.model.api.support.annotation.AnnotationModelHelper.runJavaSourceTask(AnnotationModelHelper.java:150)
        at org.netbeans.modules.websvc.rest.model.impl.RestServicesMetadataModelImpl.runReadAction(RestServicesMetadataModelImpl.java:74)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren.createNodes(RestServicesChildren.java:159)
        at org.openide.nodes.Children$Keys$KE.nodes(Children.java:1596)
        at org.openide.nodes.ChildrenArray.nodesFor(ChildrenArray.java:168)
        at org.openide.nodes.EntrySupport$Default$Info.nodes(EntrySupport.java:925)
        at org.openide.nodes.EntrySupport$Default.updateAdd(EntrySupport.java:505)
        at org.openide.nodes.EntrySupport$Default.setEntries(EntrySupport.java:345)
        at org.openide.nodes.Children$Keys$2.run(Children.java:1490)
        at org.openide.util.Mutex$1Exec.run(Mutex.java:1239)
        at org.openide.nodes.Children$ProjectManagerDeadlockDetector.execute(Children.java:1796)
        at org.openide.util.Mutex.postRequest(Mutex.java:1245)
        at org.openide.util.Mutex.postRequest(Mutex.java:1209)
        at org.openide.util.Mutex.postWriteRequest(Mutex.java:582)
        at org.openide.nodes.Children$Keys.applyKeys(Children.java:1499)
        at org.openide.nodes.Children$Keys.setKeys(Children.java:1443)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren.updateKeys(RestServicesChildren.java:151)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren.access$000(RestServicesChildren.java:64)
        at org.netbeans.modules.websvc.rest.nodes.RestServicesChildren$1.run(RestServicesChildren.java:70)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)