ok the was a duplicate but wrong implementation.
but now i got error while executing the actionhander
org.jbpm.JbpmException: this token is locked by token
so i could not signal the process.
where is the error ?
ok signal in an actionhandler is not possible
How did you solved the "cannot be cast to org.jbpm.graph.def.ActionHandler" exception? thanks
Read carefully... he had another implementation of a class with the same package and classname but that did not implement the correct interface.