batik and fop on weblogic 5.1

[Benny]

Hi i am using fop to generate dynamical pdf documents from a servlet,
in weblogic 5.1.
Fop works very fine but i need to generate barcodes in my documents so
i am integrating it with krysalis barcode libraries. The integration
works fine if i test it from a standalone application (pdf with
barcode is printed), but there are problems using it from the weblogic
servlet; the document is generated but the barcode is not and after
many different tests i am having the following exception. Surely the
problem is about batik libraries that are used by krysalis to generate
the barcode in svg format, but i don't understand why the exception is
only when i work in weblogic.

[ERROR] svg graphic could not be built:
zip:/bea9/sottosistemi/sicurezza/beinter/h2o/myclasses/fop/batik.jar#org/apache/batik/dom/svg/resources/UserAgentStyleSheet.css:
Invalid CSS document.
name
org.w3c.dom.DOMException:
zip:/bea9/sottosistemi/sicurezza/beinter/h2o/myclasses/fop/batik.jar#org/apache/batik/dom/svg/resources/UserAgentStyleSheet.css:
Invalid CSS document.
name
at org.apache.batik.css.engine.CSSEngine.parseStyleSheet(Unknown
Source)
at org.apache.batik.css.engine.CSSEngine.parseStyleSheet(Unknown
Source)
at org.apache.batik.dom.svg.SVGDOMImplementation.createCSSEngine(Unknown
Source)
at org.apache.batik.bridge.BridgeContext.initializeDocument(Unknown
Source)
at org.apache.batik.bridge.GVTBuilder.build(Unknown Source)
at org.apache.fop.render.pdf.PDFRenderer.renderSVGDocument(Unknown
Source)
at org.apache.fop.render.pdf.PDFRenderer.renderSVGArea(Unknown
Source)
at org.apache.fop.svg.SVGArea.render(Unknown Source)
at org.apache.fop.render.pdf.PDFRenderer.renderForeignObjectArea(Unknown
Source)
at org.apache.fop.layout.inline.ForeignObjectArea.render(Unknown
Source)
at org.apache.fop.render.AbstractRenderer.renderLineArea(Unknown
Source)
at org.apache.fop.layout.LineArea.render(Unknown Source)
at org.apache.fop.render.AbstractRenderer.renderBlockArea(Unknown
Source)
at org.apache.fop.layout.BlockArea.render(Unknown Source)
at org.apache.fop.render.AbstractRenderer.renderAreaContainer(Unknown
Source)
at org.apache.fop.render.pdf.PDFRenderer.renderPage(Unknown
Source)
at org.apache.fop.render.pdf.PDFRenderer.render(Unknown
Source)
at org.apache.fop.apps.StreamRenderer.queuePage(Unknown
Source)
at org.apache.fop.layout.AreaTree.addPage(Unknown Source)
at org.apache.fop.fo.pagination.PageSequence.format(Unknown
Source)
at org.apache.fop.apps.StreamRenderer.render(Unknown Source)
at org.apache.fop.fo.FOTreeBuilder.endElement(Unknown Source)
at org.apache.xalan.transformer.ResultTreeHandler.endElement(ResultTreeHandler.java:307)
at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:716)
at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2186)
at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java:710)
at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java:420)
at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:226)
at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java:2186)
at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2012)
at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1175)
at org.apache.xalan.transformer.TransformerImpl.run(TransformerImpl.java:3139)
at org.apache.xalan.transformer.TransformerHandlerImpl.endDocument(TransformerHandlerImpl.java:433)
at org.apache.xerces.parsers.SAXParser.endDocument(SAXParser.java:1230)
at org.apache.xerces.validators.common.XMLValidator.callEndDocument(XMLValidator.java:1080)
at org.apache.xerces.framework.XMLDocumentScanner$EndOfInputDispatcher.dispatch(XMLDocumentScanner.java:1499)
at org.apache.xerces.framework.XMLDocumentScanner.parseSome(XMLDocumentScanner.java:381)
at org.apache.xerces.framework.XMLParser.parse(XMLParser.java:1081)
at org.apache.xalan.transformer.TrAXFilter.parse(TrAXFilter.java:134)
at org.apache.fop.apps.Driver.render(Unknown Source)
at org.apache.fop.apps.CommandLineStarter.run(Unknown Source)
at it.sella.fop.servlet.FOPPrinterServlet.doPost(FOPPrinterServlet.java:55)
at it.sella.fop.servlet.FOPPrinterServlet.doGet(FOPPrinterServlet.java:34)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:740)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:865)
at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:120)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:941)
at weblogic.servlet.internal.ServletContextImpl.invokeServlet(ServletContextImpl.java:905)
at weblogic.servlet.internal.ServletContextManager.invokeServlet(ServletContextManager.java:269)
at weblogic.socket.MuxableSocketHTTP.invokeServlet(MuxableSocketHTTP.java:391)
at weblogic.socket.MuxableSocketHTTP.execute(MuxableSocketHTTP.java:273)
at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:129)

thx & regards,
Benny