sorry for my firts post
My problem is :
i had a variable as this :

<variable access="read,write" name="varGroup"></variable>

and and action that set a value of this variable

public class UserOfGroupActionHandler implements ActionHandler {
public static String actors = "";
public void execute(ExecutionContext executionContext) {
...
..
.
executionContext.setVariable("varGroup", actors);
}

in my process definition a have this :

<event type="task-assign">
<action class='com.action.UserOfGroupActionHandler' />

<mail name="demande-notif" actors="#{varGroup}" >

in my logging appserver i understand that the action don t call the class and the group are not evaluated!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!


thank you for your help