diff --git a/moeo/src/continue/moeoHypContinue.h b/moeo/src/continue/moeoHypContinue.h
index 9ecc5424e..5fd5c47ad 100644
--- a/moeo/src/continue/moeoHypContinue.h
+++ b/moeo/src/continue/moeoHypContinue.h
@@ -59,7 +59,7 @@ public:
     typedef typename ObjectiveVector::Type AtomType;
 
     /// Ctor
-    moeoHypContinue(  const std::vector<AtomType> & _OptimVec, moeoArchive < MOEOT > & _archive,  bool _normalize=true, AtomType _rho=1.1)
+    moeoHypContinue(  const std::vector<AtomType> & _OptimVec, moeoArchive < MOEOT > & _archive,  bool _normalize=true, double _rho=1.1)
         : eoContinue<MOEOT>(), arch(_archive), metric(_normalize,_rho)
     {
         vectorToParetoSet(_OptimVec);
diff --git a/moeo/src/core/moeoDualRealObjectiveVector.h b/moeo/src/core/moeoDualRealObjectiveVector.h
index 9be12d8f7..dbba265c0 100644
--- a/moeo/src/core/moeoDualRealObjectiveVector.h
+++ b/moeo/src/core/moeoDualRealObjectiveVector.h
@@ -33,17 +33,19 @@ Authors:
 
 #include <comparator/moeoObjectiveObjectiveVectorComparator.h>
 #include <comparator/moeoParetoObjectiveVectorComparator.h>
-#include <core/moeoRealObjectiveVector.h>
+#include <core/moeoScalarObjectiveVector.h>
 
-template < class ObjectiveVectorTraits >
-class moeoDualRealObjectiveVector : public moeoScalarObjectiveVector<ObjectiveVectorTraits, eoMinimizingDualFitness >
+template < class ObjectiveVectorTraits, class T = eoMinimizingDualFitness /* can be an eoMaximizingDualFitness */>
+class moeoDualRealObjectiveVector : public moeoScalarObjectiveVector<ObjectiveVectorTraits, T >
 {
     protected:
         bool _is_feasible;
 
     public:
 
-        moeoDualRealObjectiveVector(double value=0.0) : moeoScalarObjectiveVector<ObjectiveVectorTraits, eoMinimizingDualFitness >(value, false) {}
+        moeoDualRealObjectiveVector(double value=0.0) 
+            : moeoScalarObjectiveVector<ObjectiveVectorTraits, eoMinimizingDualFitness >
+              ( T(value, false) ) {}
 
         bool is_feasible() const
         {
diff --git a/moeo/src/core/moeoScalarObjectiveVector.h b/moeo/src/core/moeoScalarObjectiveVector.h
index 0f33812c3..9d1183ad7 100644
--- a/moeo/src/core/moeoScalarObjectiveVector.h
+++ b/moeo/src/core/moeoScalarObjectiveVector.h
@@ -151,8 +151,8 @@ class moeoScalarObjectiveVector : public moeoObjectiveVector < ObjectiveVectorTr
  * @param _os output stream
  * @param _objectiveVector the objective vector to write
  */
-template < class ObjectiveVectorTraits >
-std::ostream & operator<<(std::ostream & _os, const moeoScalarObjectiveVector < ObjectiveVectorTraits > & _objectiveVector)
+template < class ObjectiveVectorTraits, class T >
+std::ostream & operator<<(std::ostream & _os, const moeoScalarObjectiveVector < ObjectiveVectorTraits, T > & _objectiveVector)
 {
   for (unsigned int i=0; i<_objectiveVector.size()-1; i++)
       _os << _objectiveVector[i] << " ";
@@ -165,10 +165,10 @@ std::ostream & operator<<(std::ostream & _os, const moeoScalarObjectiveVector <
  * @param _is input stream
  * @param _objectiveVector the objective vector to read
  */
-template < class ObjectiveVectorTraits >
-std::istream & operator>>(std::istream & _is, moeoScalarObjectiveVector < ObjectiveVectorTraits > & _objectiveVector)
+template < class ObjectiveVectorTraits, class T >
+std::istream & operator>>(std::istream & _is, moeoScalarObjectiveVector < ObjectiveVectorTraits, T > & _objectiveVector)
 {
-  _objectiveVector = moeoScalarObjectiveVector < ObjectiveVectorTraits > ();
+  _objectiveVector = moeoScalarObjectiveVector < ObjectiveVectorTraits, T > ();
   for (unsigned int i=0; i<_objectiveVector.size(); i++)
     {
       _is >> _objectiveVector[i];
diff --git a/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h b/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h
index a25382f41..3159c2840 100644
--- a/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h
+++ b/moeo/src/fitness/moeoExpBinaryIndicatorBasedFitnessAssignment.h
@@ -154,7 +154,7 @@ class moeoExpBinaryIndicatorBasedFitnessAssignment : public moeoBinaryIndicatorB
      */
     void setup(const eoPop < MOEOT > & _pop)
     {
-      double min, max;
+      typename MOEOT::ObjectiveVector::Type min, max;
       for (unsigned int i=0; i<ObjectiveVector::Traits::nObjectives(); i++)
         {
           min = _pop[0].objectiveVector()[i];