Oups it was due to the fact that I still had the tapestry 3.0 jar in my global classpath of jboss :) Remove them and changing the import to the real T5 Block interface resolve it...
Regards, Mondes_engloutis. --- En date de : Jeu 25.3.10, jaques robert <mondes_englou...@yahoo.fr> a écrit : De: jaques robert <mondes_englou...@yahoo.fr> Objet: No classdeffound org.apache.tapestry.components.Block À: users@tapestry.apache.org Date: Jeudi 25 mars 2010, 23h15 Hi, I'm trying the tutorial inside http://wiki.apache.org/tapestry/Tapestry5Training?action=AttachFile&do=view&target=Tapestry5TrainingFiles.zip. However the exercise 14 about customizing Grid leads me to the following error : << java.lang.NoClassDefFoundErrorcom/repository/wizard/tapestry/pages/Mainjava.lang.ClassNotFoundExceptioncaught an exception while obtaining a class file for com.repository.wizard.tapestry.pages.Mainexceptionorg.apache.tapestry5.internal.services.TransformationException: javassist.NotFoundException: org.apache.tapestry.components.Blockorg.apache.tapestry5.internal.services.TransformationExceptionjavassist.NotFoundException: org.apache.tapestry.components.Bloc>> Does it mean that I miss a library somewhere ? Regards, Mondes_engloutis.