Turn on debug info in the build.xml and recompile FOP. Having line numbers will make it a lot easier for you to track down the problem. Looking at the source of Driver I guess you don't have a method addToBuilder(FOTreeBuilder) in your ElementMapping implementation.
On 21.11.2002 22:25:24 Raffi Simon wrote: > I follow the directions to extend FOP, I created a jar file with my classes > and place a org.apache.fop.fo.ElementMapping file in the jar and when I run > the FOP with my custom element I get the following. > [INFO] FOP 0.20.4rc > Exception in thread "main" java.lang.AbstractMethodError > 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 org.apache.fop.apps.CommandLineStarter.run(Unknown Source) > at org.apache.fop.apps.Fop.main(Unknown Source) > Can anyone help? > -Raf Jeremias Maerki --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]