Use ParameterDatabase's "set" method public final synchronized void set(Parameter parameter, String value) Gabriel On Wed, 20 Feb 2008, ghada wrote: > Hi all, > > > > I need to set the mutation rate inside my program (and not in the .params > file) , to be able to make it dynamic with the generation number - for > example to start with a low mutation rate that gets higher as the generation > number increases. Any idea how to do that in the ECJ? > > > > Best regards > > Ghada > >