diff --git a/lemon/soplex.h b/lemon/soplex.h
--- a/lemon/soplex.h
+++ b/lemon/soplex.h
@@ -73,16 +73,18 @@
     SoplexLp(const SoplexLp&);
     /// \e
     ~SoplexLp();
+    /// \e
+    virtual SoplexLp* newSolver() const;
+    /// \e
+    virtual SoplexLp* cloneSolver() const;
 
   protected:
 
-    virtual SoplexLp* _newSolver() const;
-    virtual SoplexLp* _cloneSolver() const;
-
     virtual const char* _solverName() const;
 
     virtual int _addCol();
     virtual int _addRow();
+    virtual int _addRow(Value l, ExprIterator b, ExprIterator e, Value u);
 
     virtual void _eraseCol(int i);
     virtual void _eraseRow(int i);
@@ -143,6 +145,11 @@
 
     virtual void _clear();
 
+    void _messageLevel(MessageLevel m);
+    void _applyMessageLevel();
+
+    int _message_level;
+
   };
 
 } //END OF NAMESPACE LEMON