line -1: error: Illegal XML character: 0x1

line 1: Illegal XML character: 0x1
org.apache.xmlbeans.impl.piccolo.io.IllegalCharException: Illegal XML character: 0x1
at org.apache.xmlbeans.impl.piccolo.xml.XMLReaderReader.read(XMLReaderReader.java:169)
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$SaxLoader.load(Locale.java:3454)
at org.apache.xmlbeans.impl.store.Locale.parse(Locale.java:712)
at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:696)
at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:683)
at org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:208)
at com.eviware.soapui.impl.wsdl.support.soap.AbstractSoapVersion.validateSoapEnvelope(AbstractSoapVersion.java:50)
at com.eviware.soapui.impl.wsdl.support.wsdl.WsdlValidator.assertResponse(WsdlValidator.java:587)
at com.eviware.soapui.support.editor.views.xml.source.XmlSourceEditorViewFactory$WsdlResponseXmlSourceEditor.validateXml(XmlSourceEditorViewFactory.java:282)
at com.eviware.soapui.support.editor.views.xml.source.XmlSourceEditorView.validate(XmlSourceEditorView.java:412)
at com.eviware.soapui.support.editor.views.xml.source.XmlSourceEditorView$ValidateMessageXmlAction.actionPerformed(XmlSourceEditorView.java:334)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.AbstractButton.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI.doClick(Unknown Source)
at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)


I wrapped one of the elements that i know is causing the problem in <!CDATA[ ....]]>
but still the same error. If i removed the problem causing element from the response, response looks fine. I see some control chars in the element. What else can i do in java to get rid of this error propping up because of this particular element containing control chars (is what i think, not sure what else is hidden)