import org.um.feri.ears.algorithms.moo.demo.D_DEMO
...
val moead = new D_MOEAD(1000)
val demo = new D_DEMO(1000, 1)
...
val task = new DoubleMOTask(EnumStopCriteria.ITERATIONS, 10000, 10000, 10000, 0.000001, myProblem);
...
val r_moead = moead.execute(task)
val r_demo = demo.execute(task)

Exception in thread "main" java.lang.NullPointerException
  at org.um.feri.ears.util.Ranking.<init>(Ranking.java:71)
  at org.um.feri.ears.algorithms.MOAlgorithm.execute(MOAlgorithm.java:188)

import org.um.feri.ears.algorithms.moo.demo.D_DEMO
...
val moead = new D_MOEAD(1000)
val demo = new D_DEMO(1000, 1)
...
val task = new DoubleMOTask(EnumStopCriteria.ITERATIONS, 10000, 10000, 10000, 0.000001, myProblem);
...
val r_demo = demo.execute(task)
val r_moead = moead.execute(task)

Exception in thread "main" java.lang.IndexOutOfBoundsException: Index out of Bound 928
  at org.um.feri.ears.problems.moo.ParetoSolution.get(ParetoSolution.java:155)
  at org.um.feri.ears.algorithms.moo.moead.MOEAD.start(MOEAD.java:208)
  at org.um.feri.ears.algorithms.moo.moead.D_MOEAD.start(D_MOEAD.java:28)
  at org.um.feri.ears.algorithms.MOAlgorithm.execute(MOAlgorithm.java:184)