no default font defined by OutputConverter

[Subbareddy Kalakota]

Hi I am getting this exception, do I need to set the default font to the Driver any where I am using fo:block tag with font-size, color, font-style attributes  inside fo:flow and fo:static-content   Driver.getContentHandler method  throwing this exception   javax.xml.transform.TransformerException: org.apache.fop.apps.FOPException: no default font defined by OutputConverter         at org.apache.xalan.templates.ElemLiteralResult.execute(ElemLiteralResult.java(Compiled Code))         at org.apache.xalan.templates.ElemApplyTemplates.transformSelectedNodes(ElemApplyTemplates.java(Compiled Code))         at org.apache.xalan.templates.ElemApplyTemplates.execute(ElemApplyTemplates.java:226)         at org.apache.xalan.transformer.TransformerImpl.executeChildTemplates(TransformerImpl.java(Compiled Code))         at org.apache.xalan.transformer.TransformerImpl.applyTemplateToNode(TransformerImpl.java:2081)         at org.apache.xalan.transformer.TransformerImpl.transformNode(TransformerImpl.java:1137)         at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:600)         at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1054)         at org.apache.xalan.transformer.TransformerImpl.transform(TransformerImpl.java:1032)         at com.verizon.wbtt.components.servlet.controller.ControllerServlet.outputXML2PdfFile(ControllerServlet.java:256 )