[rules-users] drools-solver NPE in DefaultSimpleScore

Hi, I migrated some solver code that I had working on 5.0M4 to the 5.1.0 implementation. I'm now seeing the following while running the solver: java.lang.NullPointerException at org.drools.solver.core.score.DefaultSimpleScore.compareTo (DefaultSimpleScore.java:73) at org.drools.solver.core.score.DefaultSimpleScore.compareTo (DefaultSimpleScore.java:13) at org.drools.solver.core.localsearch.bestsolution.BestSolutionRecaller.stepTaken (BestSolutionRecaller.java:56) at org.drools.solver.core.localsearch.DefaultLocalSearchSolver.stepTaken (DefaultLocalSearchSolver.java:171) at org.drools.solver.core.localsearch.DefaultLocalSearchSolver.solveImplementation (DefaultLocalSearchSolver.java:121) at org.drools.solver.core.AbstractSolver.solve(AbstractSolver.java:41) I ran my test with a debugger attached, and this call is returning a Null: Score bestScore = localSearchSolverScope.getBestScore(); <org.drools.solver.core.localsearch.bestsolution.BestSolutionRecaller: 55> The BestSolution is not null although the best score is. Should I file an issue on this in JIRA? Or perhaps this reflects some change to the old code that I didn't migrate properly? best wishes, Andrew