--- branches/development/src/optimization/Problem.hpp	2012/06/06 15:52:25	1747
+++ branches/development/src/optimization/Problem.hpp	2012/06/07 02:47:21	1749
@@ -134,7 +134,7 @@ namespace QuantLib {
     
     inline void Problem::reset() {
         functionEvaluation_ = gradientEvaluation_ = 0;
-        functionValue_ = squaredNorm_ = NULL;
+        functionValue_ = squaredNorm_ = 0;
     }
     
 }