Maciej Swiderski [http://community.jboss.org/people/swiderski.maciej] replied to the discussion "error on serialization object" To view the discussion, visit: http://community.jboss.org/message/540856#540856 -------------------------------------------------------------- Hi, just went through your attachment and it looks like you did not deploy your class that should be invoked for java activity. Please deploy it same was as you do it with *.jpdl.xml file. In general, make sure that your class is available on classpath for jbpm process engine. HTH Maciej -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/540856#540856] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]