Hi, thank you very much for your help I am sorry for the slow reply but 
I have been trying to get this to work for the last week and I still 
don't seem to be able to do it :-(

I understand from my model class I call:  Stoppable stopThis = 
schedule.scheduleRepeating(agent1); instead of just 
schedule.scheduleRepeating(agent1).

I think i am right in saying this then goes over to my agent class and 
repeatedly runs my steppable method:

public void step(SimState state)
    {
        if (mutantNeighbours.numObjs > 0 && higherFitness == false)
        {
            walkLandscape();
   
            if (higherFitness == true)
            {
                higherFitness = false;
                getOneMutantNeighbours();
            }
        }
            else
            {
              System.out.println("*** Higher Fitness Values Found ***");
            System.out.println("Fitness Value: "+ localPeak);
            meanFitness += localPeak;
            peakFound = true;
           
          // ** THIS IS WHERE I THEN WANT TO FINISH THE SIMULATION ** //

             stopThis.stop();

            }

So I have to call stopThis.stop() yes? but I called Stoppable stopThis = 
schedule.scheduleRepeating(agent1) in my model classes start method so 
the stopThis.stop() will not be recognised in my agent class. I tried 
making Stoppable stopThis a static variable in the model class as the 
agent class extends the model class but this didn't seem to stop the 
simulation just throw Exception in thread "AWT-EventQueue-0" 
java.lang.NullPointerException instead.

I just want it to stop the simulation record the results then then run 
it again N times.

I am sorry to be a pain and I am sure this is really simple I am just 
missing the concept of it I think, I apologise but please understand it 
is my first time ever with agent based programming. :-(

Please help

Thanks in advance

Rick



Sean Luke wrote:
> On Apr 15, 2007, at 5:21 AM, Rick wrote:
>
>> What I want to do is run a simulation until a flag = true store that 
>> result and then run the same simulation again (x number of times). 
>> Preferably with the results at the end of each simulation being 
>> displayed in a chart. (simulations could run one after another or all 
>> together should not matter that much, would maybe like to have an 
>> option for either though if one is not a lot more complex than the 
>> other.
>>
>> The problem I am getting at the moment is stopping the 
>> schedule.scheduleRepeating() I just cant do it! think i have tried 
>> everything but it does not seem to stop.
>
> There are various issues here:
>
>     - Handling the chart redisplaying itself
>         [for later discussion]
>     - Restarting an entire simulation
>         [if you're running from the command line, the easiest way to 
> do this to run N simulation runs via your outer simulation stepper -- 
> for example, you could just say   sim.app.blah.Blah -repeat R   ]
>     - killing a repeat
>
> Killing a repeat is easy.  When you call scheduleRepeating, you get 
> back an object called a Stoppable.
>
>         Stoppable stopThis = schedule.scheduleRepeating(agent1);
>
> All you have to do is squirrel away this Stoppable until the time 
> comes when you'd like the repeat to stop, at which time you call
>
>     stopThis.stop()
>
> You might schedule a "stopper" in the future which does this at a 
> preordained time:
>
>         final Stoppable stopThis = schedule.scheduleRepeating(agent1);
>     schedule.scheduleOnce(theTimeInTheFuture, new Steppable()
>         {
>         public void step(SimState state)
>             {
>             stopThis.stop();
>             }
>         });
>
> Mark is correct about killing a whole simulation, but you should only 
> do that if you can't find all the repeated scheduled items you set up.
>
> Sean