import groovy.xml.MarkupBuilder

def buildXmlErrorFile(String reason){
  def writer = new StringWriter()
  def xml = new MarkupBuilder(writer)
  xml.CalibrationResults(){
    xml.mkp.xmlDeclaration(writer)
    Status('Error')
    Reason(reason)
  }  
  print writer.toString()
}



buildXmlErrorFile("test reason as param")