java.lang.NullPointerException
        at org.netbeans.modules.xml.wsdl.model.extensions.bpel.validation.xpath.PathValidatorVisitor.getPropertyType(PathValidatorVisitor.java:408)
        at org.netbeans.modules.xml.wsdl.model.extensions.bpel.validation.xpath.PathValidatorVisitor.visit(PathValidatorVisitor.java:172)
        at org.netbeans.modules.xml.wsdl.model.extensions.bpel.validation.xpath.BPELExtensionXpathVisitor.visit(BPELExtensionXpathVisitor.java:189)
        at org.netbeans.modules.xml.wsdl.model.extensions.bpel.impl.PropertyAliasImpl.accept(PropertyAliasImpl.java:125)
        at org.netbeans.modules.xml.wsdl.model.extensions.bpel.validation.AbstractValidator.validate(AbstractValidator.java:104)
        at org.netbeans.modules.xml.xam.spi.Validation.validate(Validation.java:100)
        at org.netbeans.modules.xml.wsdl.validator.visitor.WSDLSemanticsVisitor.visit(WSDLSemanticsVisitor.java:704)
        at org.netbeans.modules.xml.wsdl.model.impl.ImportImpl.accept(ImportImpl.java:74)
        at org.netbeans.modules.xml.wsdl.validator.visitor.WSDLSemanticsVisitor.visitChildren(WSDLSemanticsVisitor.java:959)
        at org.netbeans.modules.xml.wsdl.validator.visitor.WSDLSemanticsVisitor.visit(WSDLSemanticsVisitor.java:332)
        at org.netbeans.modules.xml.wsdl.model.impl.DefinitionsImpl.accept(DefinitionsImpl.java:152)
        at org.netbeans.modules.xml.wsdl.validator.WSDLSemanticValidator.validate(WSDLSemanticValidator.java:38)
        at org.netbeans.modules.xml.xam.spi.Validation.validate(Validation.java:100)
        at org.netbeans.modules.xml.validation.ValidationOutputWindowController.validate(ValidationOutputWindowController.java:86)
        at org.netbeans.modules.xml.validation.ValidateAction$RunAction.run(ValidateAction.java:112)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:561)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:986)