> Hi all,
> I am getting the following error.To avoid this I have to restart the  
> server every time I make the changes.Please give the solution.
>
>  Thanks in advance.
>
> Orbeon Forms Error
> Type
> class java.lang.VerifyError
> Message
> class loading constraint violated (class: org/orbeon/saxon/style/
> StyleElement method: getNamespaceResolver()Lorg/orbeon/saxon/om/
> NamespaceResolver;) at pc: 0
> Stack Trace
> java.lang.VerifyError: class loading constraint violated (class: org/
> orbeon/saxon/style/StyleElement method: getNamespaceResolver()Lorg/
> orbeon/saxon/om/NamespaceResolver;) at pc: 0   at  
> java.lang.J9VMInternals.verifyImpl(Native Method)   at  
> java.lang.J9VMInternals.verify(J9VMInternals.java:59)   at  
> java.lang.J9VMInternals.verify(J9VMInternals.java:57)   at
>  java.lang.J9VMInternals.initialize(J9VMInternals.java:120)   at  
> org
> .orbeon
> .saxon.style.StyleNodeFactory.makeXSLElement(StyleNodeFactory.java:
> 340)   at  
> org
> .orbeon
> .saxon.style.StyleNodeFactory.makeElementNode(StyleNodeFactory.java:
> 82)   at  
> org.orbeon.saxon.tree.TreeBuilder.startContent(TreeBuilder.java:
> 179)   at  
> org.orbeon.saxon.style.UseWhenFilter.startContent(UseWhenFilter.java:
> 158)   at  
> org
> .orbeon.saxon.event.StartTagBuffer.startContent(StartTagBuffer.java:
> 131)   at  
> org.orbeon.saxon.event.ProxyReceiver.startContent(ProxyReceiver.java:
> 162)   at  
> org.orbeon.saxon.event.ProxyReceiver.startContent(ProxyReceiver.java:
> 162)   at  
> org
> .orbeon
> .saxon
> .event
> .ReceivingContentHandler.startElement(ReceivingContentHandler.java:
> 268)   at  
> org
> .orbeon
> .oxf.xml.TeeContentHandler.startElement(TeeContentHandler.java:80)    
> at  
> org
> .orbeon
> .oxf
> .xml
> .ForwardingContentHandler.startElement(ForwardingContentHandler.java:
> 87)   at org.orbeon.oxf.xml.SAXStore.startElement(SAXStore.java:
> 401)   at
>  
> org
> .orbeon
> .oxf
> .xml
> .ForwardingContentHandler.startElement(ForwardingContentHandler.java:
> 87)   at  
> orbeon
> .apache
> .xerces
> .parsers.AbstractSAXParser.startElement(AbstractSAXParser.java:
> 497)   at  
> orbeon
> .apache
> .xerces
> .impl
> .XMLNSDocumentScannerImpl
> .scanStartElement(XMLNSDocumentScannerImpl.java:283)   at  
> orbeon.apache.xerces.impl.XMLNSDocumentScannerImpl
> $
> NSContentDispatcher
> .scanRootElementHook(XMLNSDocumentScannerImpl.java:736)   at  
> orbeon.apache.xerces.impl.XMLDocumentFragmentScannerImpl
> $
> FragmentContentDispatcher
> .dispatch(XMLDocumentFragmentScannerImpl.java:1755)   at  
> orbeon
> .apache
> .xerces
> .impl
> .XMLDocumentFragmentScannerImpl
> .scanDocument(XMLDocumentFragmentScannerImpl.java:324)   at  
> orbeon
> .apache
> .xerces.parsers.XML11Configuration.parse(XML11Configuration.java:
> 845)   at  
> orbeon
> .apache
> .xerces.parsers.XML11Configuration.parse(XML11Configuration.java:
> 768)   at  
> orbeon.apache.xerces.parsers.XMLParser.parse(XMLParser.java:108)   at
>  
> orbeon
> .apache
> .xerces.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:
> 1201)   at  
> org.orbeon.oxf.xml.XMLUtils.inputSourceToSAX(XMLUtils.java:273)   at  
> org.orbeon.oxf.xml.XMLUtils.inputStreamToSAX(XMLUtils.java:258)   at  
> org
> .orbeon
> .oxf
> .resources
> .ResourceManagerBase.getContentAsSAX(ResourceManagerBase.java:134)    
> at org.orbeon.oxf.resources.PriorityResourceManagerImpl
> $4.run(PriorityResourceManagerImpl.java:122)   at  
> org
> .orbeon
> .oxf
> .resources
> .PriorityResourceManagerImpl
> .delegate(PriorityResourceManagerImpl.java:271)   at  
> org
> .orbeon
> .oxf
> .resources
> .PriorityResourceManagerImpl
> .getContentAsSAX(PriorityResourceManagerImpl.java:120)   at  
> org.orbeon.oxf.processor.generator.URLGenerator
> $OXFResourceHandler.readXML(URLGenerator.java:667)   at  
> org.orbeon.oxf.processor.generator.URLGenerator
> $1.readImpl(URLGenerator.java:414)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at
>  org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf
> .xml.ProcessorOutputXMLReader.parse(ProcessorOutputXMLReader.java:
> 40)   at org.orbeon.saxon.event.Sender.sendSAXSource(Sender.java:
> 269)   at org.orbeon.saxon.event.Sender.send(Sender.java:124)   at  
> org.orbeon.saxon.event.Sender.send(Sender.java:46)   at  
> org
> .orbeon
> .saxon
> .PreparedStylesheet.loadStylesheetModule(PreparedStylesheet.java:
> 204)   at  
> org.orbeon.saxon.PreparedStylesheet.prepare(PreparedStylesheet.java:
> 126)   at  
> org
> .orbeon
> .saxon
> .TransformerFactoryImpl.newTemplates(TransformerFactoryImpl.java:
> 135)   at  
> org
> .orbeon.oxf.xml.TransformerUtils.getTemplates(TransformerUtils.java:
> 235)   at org.orbeon.oxf.processor.transformer.xslt.XSLTTransformer
> $1.createTransformer(XSLTTransformer.java:529)   at  
> org.orbeon.oxf.processor.transformer.xslt.XSLTTransformer
> $1.readImpl(XSLTTransformer.java:144)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at
>  org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.IdentityProcessor
> $1.readImpl(IdentityProcessor.java:33)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $000(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $2.run(PipelineProcessor.java:94)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.executeChildren(ProcessorImpl.java:
> 554)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $100(PipelineProcessor.java:64)   at
>  org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $1.readImpl(PipelineProcessor.java:92)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor
> $1.readImpl(ConcreteChooseProcessor.java:122)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org.orbeon.oxf.processor.validation.MSVValidationProcessor.access
> $700(MSVValidationProcessor.java:44)   at  
> org.orbeon.oxf.processor.validation.MSVValidationProcessor
> $5.readImpl(MSVValidationProcessor.java:219)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at
>  org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsDOM4J(ProcessorImpl.java:
> 403)   at org.orbeon.oxf.processor.generator.URLGenerator.access
> $300(URLGenerator.java:60)   at  
> org.orbeon.oxf.processor.generator.URLGenerator
> $2.read(URLGenerator.java:266)   at  
> org
> .orbeon
> .oxf
> .processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:
> 488)   at org.orbeon.oxf.processor.generator.URLGenerator.access
> $700(URLGenerator.java:60)   at  
> org.orbeon.oxf.processor.generator.URLGenerator
> $1.readImpl(URLGenerator.java:263)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at
>  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.xinclude.XIncludeProcessor.access
> $100(XIncludeProcessor.java:41)   at  
> org.orbeon.oxf.processor.xinclude.XIncludeProcessor
> $2.read(XIncludeProcessor.java:85)   at  
> org
> .orbeon
> .oxf
> .processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:
> 488)   at org.orbeon.oxf.processor.xinclude.XIncludeProcessor.access
> $200(XIncludeProcessor.java:41)   at  
> org.orbeon.oxf.processor.xinclude.XIncludeProcessor
> $1.readImpl(XIncludeProcessor.java:79)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.TeeProcessor.access
> $000(TeeProcessor.java:36)   at  
> org.orbeon.oxf.processor.pipeline.TeeProcessor
> $1.readImpl(TeeProcessor.java:59)   at
>  org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsTinyTree(ProcessorImpl.java:
> 412)   at org.orbeon.oxf.processor.ProcessorImpl
> $5.read(ProcessorImpl.java:445)   at  
> org
> .orbeon
> .oxf
> .processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:
> 488)   at  
> org
> .orbeon
> .oxf
> .processor.ProcessorImpl.readCacheInputAsTinyTree(ProcessorImpl.java:
> 443)   at  
> org
> .orbeon
> .oxf
> .processor
> .pipeline
> .choose.ConcreteChooseProcessor.start(ConcreteChooseProcessor.java:
> 185)   at  
> org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor
> $1.readImpl(ConcreteChooseProcessor.java:120)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at
>  org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.IdentityProcessor
> $1.readImpl(IdentityProcessor.java:33)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $000(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $2.run(PipelineProcessor.java:94)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.executeChildren(ProcessorImpl.java:
> 554)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $100(PipelineProcessor.java:64)   at
>  org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $1.readImpl(PipelineProcessor.java:92)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.IdentityProcessor
> $1.readImpl(IdentityProcessor.java:33)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.IdentityProcessor
> $1.readImpl(IdentityProcessor.java:33)   at
>  org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $000(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $2.run(PipelineProcessor.java:94)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.executeChildren(ProcessorImpl.java:
> 554)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $100(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $1.readImpl(PipelineProcessor.java:92)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at
>  org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor
> $1.readImpl(ConcreteChooseProcessor.java:122)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.IdentityProcessor
> $1.readImpl(IdentityProcessor.java:33)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $000(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $2.run(PipelineProcessor.java:94)   at
>  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.executeChildren(ProcessorImpl.java:
> 554)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $100(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $1.readImpl(PipelineProcessor.java:92)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor
> $1.readImpl(ConcreteChooseProcessor.java:122)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 353)   at org.orbeon.oxf.processor.IdentityProcessor
> $1.readImpl(IdentityProcessor.java:33)   at
>  org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $000(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $2.run(PipelineProcessor.java:94)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.executeChildren(ProcessorImpl.java:
> 554)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $100(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $1.readImpl(PipelineProcessor.java:92)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at
>  org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor
> $1.readImpl(ConcreteChooseProcessor.java:122)   at  
> org.orbeon.oxf.processor.ProcessorImpl$7.read(ProcessorImpl.java:
> 1030)   at org.orbeon.oxf.processor.ProcessorImpl
> $ProcessorOutputImpl.read(ProcessorImpl.java:1213)   at  
> org
> .orbeon
> .oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:
> 348)   at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access
> $1400(PipelineProcessor.java:64)   at  
> org.orbeon.oxf.processor.pipeline.PipelineProcessor
> $6.run(PipelineProcessor.java:567)   at org.
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