Error with WebSphere

[Paolo Beatrici]

I've just installed an application embedding fop into Websphere 4.0.1 Advanced Edition on Linux. We got the following exception :   [03.01.16 14:32:02:736 CET] 10b37e12 ExceptionUtil X CNTR0020E: Non-application exception occurred while processing method createOutput on bean BeanId(Deployed_tes_isybusEjbWAS#tes_isybusEjb.jar#Isybus, f2c72ebaa6): java.lang.AbstractMethodError: javax/xml/parsers/SAXParser.getXMLReader at org.apache.fop.apps.Driver.getParserClassName(Unknown Source) at org.apache.fop.svg.SVGElementMapping.setupSVG(Unknown Source) at org.apache.fop.svg.SVGElementMapping.addToBuilder(Unknown Source) at org.apache.fop.apps.Driver.addElementMapping(Unknown Source) at org.apache.fop.apps.Driver.addElementMapping(Unknown Source) at org.apache.fop.apps.Driver.setupDefaultMappings(Unknown Source) at org.apache.fop.apps.Driver.<init>(Unknown Source) at com.isyde.isydriver.output.FopDriver.save(FopDriver.java:86) at com.isyde.isybusparser.output.IsyFopDriver.save(IsyFopDriver.java:76) at com.isyde.isybusparser.DDMParser.parse(DDMParser.java:95) at com.isyde.isybus.so.Isybus.createOutput(Isybus.java:72)   Can you help me about this? Thank you. Paolo Beatrici