Index: branches/HeuristicLab.EvolutionaryTracking/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs
===================================================================
--- branches/HeuristicLab.EvolutionaryTracking/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs	(revision 7439)
+++ branches/HeuristicLab.EvolutionaryTracking/HeuristicLab.Encodings.SymbolicExpressionTreeEncoding/3.4/Crossovers/SubtreeCrossover.cs	(revision 7479)
@@ -38,5 +38,5 @@
   [Item("SubtreeCrossover", "An operator which performs subtree swapping crossover.")]
   [StorableClass]
-  public sealed class SubtreeCrossover : SymbolicExpressionTreeCrossover, ISymbolicExpressionTreeSizeConstraintOperator {
+  public sealed class SubtreeCrossover : TracingSymbolicExpressionTreeCrossover, ISymbolicExpressionTreeSizeConstraintOperator {
     private const string InternalCrossoverPointProbabilityParameterName = "InternalCrossoverPointProbability";
     private const string MaximumSymbolicExpressionTreeLengthParameterName = "MaximumSymbolicExpressionTreeLength";