critical error report

      class org.apache.xmlbeans.XmlException 
     error: Illegal XML character: 0x3 
     org.apache.xmlbeans.impl.piccolo.io.IllegalCharException: Illegal XML character: 0x3 
     at org.apache.xmlbeans.impl.piccolo.xml.UTF8XMLDecoder.decode(UTF8XMLDecoder..java:196) 
     at org.apache.xmlbeans.impl.piccolo.xml.XMLStreamReader$FastStreamDecoder.read(XMLStreamReader.java:762) 
     at org.apache.xmlbeans.impl.piccolo.xml.XMLStreamReader.read(XMLStreamReader..java:162) 
     at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.yy_refill(PiccoloLexer.java:3474) 
     at org.apache.xmlbeans.impl.piccolo.xml.PiccoloLexer.yylex(PiccoloLexer.java:3958) 
     at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.yylex(Piccolo.java:1290) 
     at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.yyparse(Piccolo.java:1400) 
     at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.parse(Piccolo.java:714) 
     at org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3454) 
     at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1276) 
     at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1263) 
     at org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345) 
     at org.w3.x2009.x10.unicorn.observationresponse.ObservationresponseDocument$Factory.parse(Unknown Source) 
     at org.w3c.unicorn.response.impl.DefaultResponseXBeans.<init>(DefaultResponseXBeans.java:60) 
     at sun.reflect.GeneratedConstructorAccessor58.newInstance(Unknown Source) 
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 
     at java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
     at org.w3c.unicorn.response.ResponseFactory.getResponse(ResponseFactory.java:24) 
     at org.w3c.unicorn.request.URIRequest.doRequest(URIRequest.java:141) 
     at org.w3c.unicorn.RequestThread.run(RequestThread.java:66) 
      
     org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3486) 
     org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1276) 
     org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1263) 
     org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345) 
     org.w3.x2009.x10.unicorn.observationresponse.ObservationresponseDocument$Factory.parse(Unknown Source) 
     org.w3c.unicorn.response.impl.DefaultResponseXBeans.<init>(DefaultResponseXBeans.java:60) 
     sun.reflect.GeneratedConstructorAccessor58.newInstance(Unknown Source) 
     sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27) 
     java.lang.reflect.Constructor.newInstance(Constructor.java:513) 
     org.w3c.unicorn.response.ResponseFactory.getResponse(ResponseFactory.java:24) 
     org.w3c.unicorn.request.URIRequest.doRequest(URIRequest.java:141) 
     org.w3c.unicorn.RequestThread.run(RequestThread.java:66)