Stop Found two components for namespace Message

Please I really need help with this. I have asked before but have received no response so trying again. I am using iReport 5.6.0 When I have a barcode element in my report I get the following message: net.sf.jasperreports.engine.component.ComponentsEnvironment findBundles Found two components for namespace http://jasperreports.sourceforge.net/jasperreports/components