java.lang.AssertionError
        at org.netbeans.modules.xml.retriever.catalog.impl.CatalogModelFactoryImpl.getCatalogWriteModelForProject(CatalogModelFactoryImpl.java:74)
        at org.netbeans.modules.xml.retriever.catalog.impl.LSResourceResolverImpl.getResolver(LSResourceResolverImpl.java:189)
        at org.netbeans.modules.xml.retriever.catalog.impl.LSResourceResolverImpl.resolveResource(LSResourceResolverImpl.java:95)
        at org.netbeans.modules.xml.wsdl.validator.WSDLInlineSchemaValidator$WSDLLSResourceResolver.resolveResource(WSDLInlineSchemaValidator.java:338)
        at com.sun.org.apache.xerces.internal.util.DOMEntityResolverWrapper.resolveEntity(DOMEntityResolverWrapper.java:106)
        at com.sun.org.apache.xerces.internal.impl.XMLEntityManager.resolveEntity(XMLEntityManager.java:1100)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.resolveDocument(XMLSchemaLoader.java:595)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.resolveSchema(XSDHandler.java:1671)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.constructTrees(XSDHandler.java:909)
        at com.sun.org.apache.xerces.internal.impl.xs.traversers.XSDHandler.parseSchema(XSDHandler.java:569)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadSchema(XMLSchemaLoader.java:552)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadGrammar(XMLSchemaLoader.java:519)
        at com.sun.org.apache.xerces.internal.impl.xs.XMLSchemaLoader.loadGrammar(XMLSchemaLoader.java:485)
        at com.sun.org.apache.xerces.internal.jaxp.validation.XMLSchemaFactory.newSchema(XMLSchemaFactory.java:210)
        at javax.xml.validation.SchemaFactory.newSchema(SchemaFactory.java:594)
        at org.netbeans.modules.xml.wsdl.validator.WSDLInlineSchemaValidator.validate(WSDLInlineSchemaValidator.java:162)
        at org.netbeans.modules.xml.wsdl.validator.WSDLInlineSchemaValidator.validate(WSDLInlineSchemaValidator.java:113)
        at org.netbeans.modules.xml.xam.spi.Validation.validate(Validation.java:95)
        at org.netbeans.modules.xml.validation.ValidationOutputWindowController.validate(ValidationOutputWindowController.java:85)
        at org.netbeans.modules.xml.validation.ValidateAction$RunAction.run(ValidateAction.java:112)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:572)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:997)