Reproduced with build 200802290610.

To reproduce the bug:
- create synchronous BPEL sample;
- create a new BPEL document newProcess.bpel in it;
- validate the new document - it's invalid, correct;
- open SynchronousSample.bpel and validate it;

XML validation started.
D:/abb/SynchronousSample/SynchronousSample/src/newProcess.bpel:2,0
ERROR: To be instantiated, an executable business process must contain at least one <receive> or <pick> activity
annotated with a createInstance="yes" attribute.

D:/abb/SynchronousSample/SynchronousSample/src/newProcess.bpel:2,0
ERROR: To be instantiated, an executable business process must contain at least one <receive> or <pick> activity
annotated with a createInstance="yes" attribute.

2 Error(s),  0 Warning(s).
XML validation finished.

- detele newProcess.bpel;
- validate SynchronousSample.bpel;

java.lang.NullPointerException
	at org.openide.text.Annotation.attach(Annotation.java:117)
	at org.netbeans.modules.bpel.core.util.BPELValidationAnnotation.show(BPELValidationAnnotation.java:65)
	at org.netbeans.modules.bpel.core.util.BPELValidationController.showAnnotationsInEditor(BPELValidationController.java:221)
	at org.netbeans.modules.bpel.core.util.BPELValidationController.notifyListeners(BPELValidationController.java:180)
	at org.netbeans.modules.bpel.core.util.BPELValidationController.access$200(BPELValidationController.java:69)
	at org.netbeans.modules.bpel.core.util.BPELValidationController$1.run(BPELValidationController.java:162)
	at java.util.TimerThread.mainLoop(Timer.java:512)
[catch] at java.util.TimerThread.run(Timer.java:462)

- validate again;

java.lang.NullPointerException
	at org.netbeans.modules.xml.validation.ui.ValidationOutputWindow.getStyledDocument(ValidationOutputWindow.java:217)
	at org.netbeans.modules.xml.validation.ui.ValidationOutputWindow.getLineNumber(ValidationOutputWindow.java:232)
	at org.netbeans.modules.xml.validation.ui.ValidationOutputWindow.showMessage(ValidationOutputWindow.java:156)
	at org.netbeans.modules.xml.validation.ui.ValidationOutputWindow.showError(ValidationOutputWindow.java:141)
	at
org.netbeans.modules.xml.validation.ui.ValidationOutputWindow.displayValidationInformation(ValidationOutputWindow.java:99)
	at
org.netbeans.modules.xml.validation.ValidationOutputWindowController.printGuidanceInformation(ValidationOutputWindowController.java:97)
	at org.netbeans.modules.xml.validation.ValidationOutputWindowController.validate(ValidationOutputWindowController.java:88)
	at org.netbeans.modules.xml.validation.ValidateAction$RunAction.run(ValidateAction.java:112)
	at
org.netbeans.modules.bpel.editors.multiview.DesignerMultiViewElement$BPELValidateAction$1.run(DesignerMultiViewElement.java:979)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)