Changeset 6570

Timestamp:

07/18/11 00:17:19 (13 years ago)

Author:

abeham

Message:

#1586

• fixed in branch

File:

• branches/QAPAlgorithms/HeuristicLab.Problems.QuadraticAssignment/3.3/QuadraticAssignmentProblem.cs (modified) (1 diff)

branches/QAPAlgorithms/HeuristicLab.Problems.QuadraticAssignment/3.3/QuadraticAssignmentProblem.cs

@@ -157 +157 @@
         ItemList<Permutation> list = ((OptionalValueParameter<ItemList<Permutation>>)Parameters["BestKnownSolutions"]).Value;
         Parameters.Remove("BestKnownSolutions");
-        Parameters.Add(new OptionalValueParameter<ItemSet<Permutation>>("BestKnownSolutions", "The list of best known solutions which is updated whenever a new better solution is found or may be the optimal solution if it is known beforehand.", new ItemSet<Permutation>(list)));
+        Parameters.Add(new OptionalValueParameter<ItemSet<Permutation>>("BestKnownSolutions", "The list of best known solutions which is updated whenever a new better solution is found or may be the optimal solution if it is known beforehand.", (list != null ? new ItemSet<Permutation>(list) : null)));
       }
       if (Parameters.ContainsKey("DistanceMatrix")) {