diff --git a/eo/src/eoParetoFitness.h b/eo/src/eoParetoFitness.h
index 4634c9f4..44594937 100644
--- a/eo/src/eoParetoFitness.h
+++ b/eo/src/eoParetoFitness.h
@@ -30,7 +30,7 @@
 #include <vector>
 #include <stdexcept>
 #include <iostream>
-
+#include <utils/eoLogger.h>
 
 /**
  * eoFitnessTraits: a traits class to specify 
@@ -45,7 +45,7 @@ class eoParetoFitnessTraits
 
   static unsigned nObjectives()          { return 2; }
   static double tol()               { return 1e-6; }
-  static bool maximizing(int which) { return true; } // by default: all are maximizing
+  static bool maximizing(int which) { (void)which; return true; } // by default: all are maximizing
 };
 
 /** 
@@ -62,10 +62,11 @@ public :
     // possible problems
     if ( nObj && (nObj != _n) )	   // was already set to a different value
       {
-	std::cout << "WARNING\n";
-	std::cout << "WARNING : you are changing the number of objectives\n";
-	std::cout << "WARNING : Make sure all existing objects are destroyed\n";
-	std::cout << "WARNING\n";
+	eo::log << eo::warnings;
+	eo::log << "WARNING\n";
+	eo::log << "WARNING : you are changing the number of objectives\n";
+	eo::log << "WARNING : Make sure all existing objects are destroyed\n";
+	eo::log << "WARNING\n";
       }
     nObj=_n; 
     bObj=_b;
diff --git a/eo/src/eoRealBoundModifier.h b/eo/src/eoRealBoundModifier.h
index b309a483..d9fa099e 100644
--- a/eo/src/eoRealBoundModifier.h
+++ b/eo/src/eoRealBoundModifier.h
@@ -46,7 +46,11 @@ public:
 
     eoDummyRealBoundModifier (){}
 
-    void operator() (eoRealBaseVectorBounds & _bnds,unsigned _i){}
+    void operator() (eoRealBaseVectorBounds & _bnds,unsigned _i)
+    {
+	(void)_bnds;
+	(void)_i;
+    }
 };
 
 
diff --git a/eo/src/utils/eoIntBounds.h b/eo/src/utils/eoIntBounds.h
index 59c98c03..074c0836 100644
--- a/eo/src/utils/eoIntBounds.h
+++ b/eo/src/utils/eoIntBounds.h
@@ -176,12 +176,17 @@ public:
     throw std::logic_error("Trying to get range of unbounded eoIntBounds");
   }
 
-  virtual double uniform(eoRng & _rng = eo::rng) const 
+  virtual double uniform(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in unbounded eoIntBounds");
   }
-  virtual long int random(eoRng & _rng = eo::rng) const 
+
+  virtual long int random(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in unbounded eoIntBounds");
   }
 
@@ -192,8 +197,10 @@ public:
    * but reading should not be done here, because of bound problems
    * see eoIntVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoIntBounds::readFrom");
   }
 
@@ -312,8 +319,10 @@ public :
    * but reading should not be done here, because of bound problems
    * see eoIntVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoIntInterval::readFrom");
   }
 
@@ -364,12 +373,17 @@ public :
     throw std::logic_error("Trying to get range of eoIntBelowBound");
   }
 
-  virtual double uniform(eoRng & _rng = eo::rng) const 
+  virtual double uniform(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in eoIntBelowBound");
   }
-  virtual long int random(eoRng & _rng = eo::rng) const 
+
+  virtual long int random(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in eoIntBelowBound");
   }
 
@@ -411,8 +425,10 @@ public :
    * but reading should not be done here, because of bound problems
    * see eoIntVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoIntBelowBound::readFrom");
   }
 
@@ -462,12 +478,17 @@ public :
     throw std::logic_error("Trying to get range of eoIntAboveBound");
   }
 
-  virtual double uniform(eoRng & _rng = eo::rng) const 
+  virtual double uniform(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in eoIntAboveBound");
   }
-  virtual long int random(eoRng & _rng = eo::rng) const 
+
+  virtual long int random(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in eoIntAboveBound");
   }
 
@@ -509,8 +530,10 @@ public :
    * but reading should not be done here, because of bound problems
    * see eoIntVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoIntAboveBound::readFrom");
   }
 
@@ -650,12 +673,12 @@ public:
   /** random generator of uniform doubles in bounds
    * @std::exception if unbounded
    */
-  virtual double uniform(eoRng & _rng = eo::rng)  const {return repBound->uniform();}
+  virtual double uniform(eoRng & _rng = eo::rng)  const {(void)_rng; return repBound->uniform();}
 
   /** random generator of uniform ints in bounds
    * @std::exception if unbounded
    */
-  virtual long int random(eoRng & _rng = eo::rng)  const {return repBound->random();}
+  virtual long int random(eoRng & _rng = eo::rng)  const {(void)_rng; return repBound->random();}
 
   /** for memory managements - ugly */
   virtual eoIntBounds * dup() const  {return repBound->dup();}
diff --git a/eo/src/utils/eoRealBounds.h b/eo/src/utils/eoRealBounds.h
index 12cb7b46..d67f4450 100644
--- a/eo/src/utils/eoRealBounds.h
+++ b/eo/src/utils/eoRealBounds.h
@@ -158,6 +158,8 @@ public:
 
   virtual double uniform(eoRng & _rng = eo::rng) const 
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in unbounded eoRealBounds");
   }
 
@@ -168,8 +170,10 @@ public:
    * but reading should not be done here, because of bound problems
    * see eoRealVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoRealBounds::readFrom");
   }
 
@@ -283,8 +287,10 @@ public :
    * but reading should not be done here, because of bound problems
    * see eoRealVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoRealInterval::readFrom");
   }
 
@@ -336,8 +342,10 @@ public :
   }
 
   // random generators
-  virtual double uniform(eoRng & _rng = eo::rng) const 
+  virtual double uniform(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in eoRealBelowBound");
   }
 
@@ -381,6 +389,8 @@ public :
    */
   virtual void readFrom(std::istream& _is) 
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoRealBelowBound::readFrom");
   }
 
@@ -431,8 +441,10 @@ public :
   }
 
   // random generators
-  virtual double uniform(eoRng & _rng = eo::rng) const 
+  virtual double uniform(eoRng & _rng = eo::rng) const
   {
+    (void)_rng;
+
     throw std::logic_error("Trying to generate uniform values in eoRealAboveBound");
   }
 
@@ -474,8 +486,10 @@ public :
    * but reading should not be done here, because of bound problems
    * see eoRealVectorBounds
    */
-  virtual void readFrom(std::istream& _is) 
+  virtual void readFrom(std::istream& _is)
   {
+    (void)_is;
+
     throw std::runtime_error("Should not use eoRealAboveBound::readFrom");
   }
 
@@ -615,7 +629,7 @@ public:
   /** random generator of uniform numbers in bounds
    * @std::exception if unbounded
    */
-  virtual double uniform(eoRng & _rng = eo::rng)  const {return repBound->uniform();}
+  virtual double uniform(eoRng & _rng = eo::rng)  const {(void)_rng; return repBound->uniform();}
 
   /** for memory managements - ugly */
   virtual eoRealBounds * dup() const  {return repBound->dup();}
diff --git a/eo/src/utils/eoRealVectorBounds.h b/eo/src/utils/eoRealVectorBounds.h
index 11144b39..7cdbcb61 100644
--- a/eo/src/utils/eoRealVectorBounds.h
+++ b/eo/src/utils/eoRealVectorBounds.h
@@ -190,7 +190,9 @@ public:
    *  An std::exception will be raised if one of the component is unbounded
    */
   virtual double uniform(unsigned _i, eoRng & _rng = eo::rng)
-  { 
+  {
+    (void)_rng;
+
     double r= (*this)[_i]->uniform();
     return r;
   }
@@ -403,12 +405,16 @@ public:
   // random generators
   virtual double uniform(unsigned, eoRng & _rng = eo::rng)
   {
+    (void)_rng;
+
     throw std::logic_error("No uniform distribution on eoRealVectorNoBounds");
   }
 
   // fills a std::vector with uniformly chosen variables in bounds
   void uniform(std::vector<double> &, eoRng & _rng = eo::rng)
   {
+    (void)_rng;
+
     throw std::logic_error("No uniform distribution on eoRealVectorNoBounds");
   }