Nikola, line 267 of MasterProblem.java is a nonsensical error in the  
current version of ECJ on SVN.  And running your example on SVN I get  
no errors.  Can you tell me what version of the software you're using?

Sean

On Feb 4, 2011, at 12:10 PM, Nikola N. wrote:

> Hello, I have tried to start the example master / slave: coevolve1,  
> run
> single computer.
>
> I have set the following lines in the coevolve1.master.params  and
> coevolve1.slave.params:
>
> verbosity = 0
> eval.compression = false
>
> However I experienced problems by starting the coevolve1 master/ 
> slave. Here
> is the printout:
> - Master response:
>
> Threads:  breed/1 eval/1
> Seed: -241285081
> Job: 0
> Setting up
> Initializing Generation 0
> Slave /127.0.0.1/1296838850404 connected successfully.
> Slave(/127.0.0.1/1296838850404) Slave is shutting down....
>
>
> - Slave response:
> ...
> reading next problem
> Read problem: 2
> Exception in thread "MainThread: " java.lang.NullPointerException
>        at ec.eval.MasterProblem.evaluate(MasterProblem.java:267)
>        at ec.eval.Slave.evaluateGroupedProblemForm(Slave.java:639)
>        at ec.eval.Slave.main(Slave.java:457)
>
>
> - Also since there are going to be some changes around coevolve  
> stuff, are
> there any changes also planned to be added to the master/slave ?
>
>
> Nikola