diff --git a/src/Gui/ViewProviderExtension.h b/src/Gui/ViewProviderExtension.h
index bde1f2323..ed3e90b9d 100644
--- a/src/Gui/ViewProviderExtension.h
+++ b/src/Gui/ViewProviderExtension.h
@@ -80,7 +80,7 @@ public:
     virtual void extensionUpdateData(const App::Property*);
     
 private:
-    Gui::ViewProviderDocumentObject* m_viewBase = nullptr;
+  //Gui::ViewProviderDocumentObject* m_viewBase = nullptr;
 };
 
 /**
diff --git a/src/Mod/Mesh/App/Core/Approximation.h b/src/Mod/Mesh/App/Core/Approximation.h
index 461f2fb72..7a2f24945 100644
--- a/src/Mod/Mesh/App/Core/Approximation.h
+++ b/src/Mod/Mesh/App/Core/Approximation.h
@@ -69,21 +69,21 @@ public:
   { return (Real)(2.0*m_afCoeff[0]*rkP.X() + m_afCoeff[2] + m_afCoeff[4]*rkP.Y()); }
   virtual Real FY (const Vector3<Real>& rkP) const
   { return (Real)(2.0*m_afCoeff[1]*rkP.Y() + m_afCoeff[3] + m_afCoeff[4]*rkP.X()); }
-  virtual Real FZ (const Vector3<Real>& rkP) const
+  virtual Real FZ (const Vector3<Real>& /*rkP*/) const
   { return (Real)-1.0; }
 
   // second-order partial derivatives
-  virtual Real FXX (const Vector3<Real>& rkP) const
+  virtual Real FXX (const Vector3<Real>& /*rkP*/) const
   { return (Real)(2.0*m_afCoeff[0]); }
-  virtual Real FXY (const Vector3<Real>& rkP) const
+  virtual Real FXY (const Vector3<Real>& /*rkP*/) const
   { return (Real)(m_afCoeff[4]); }
-  virtual Real FXZ (const Vector3<Real>& rkP) const
+  virtual Real FXZ (const Vector3<Real>& /*rkP*/) const
   { return (Real)0.0; }
-  virtual Real FYY (const Vector3<Real>& rkP) const
+  virtual Real FYY (const Vector3<Real>& /*rkP*/) const
   { return (Real)(2.0*m_afCoeff[1]); }
-  virtual Real FYZ (const Vector3<Real>& rkP) const
+  virtual Real FYZ (const Vector3<Real>& /*rkP*/) const
   { return (Real)0.0; }
-  virtual Real FZZ (const Vector3<Real>& rkP) const
+  virtual Real FZZ (const Vector3<Real>& /*rkP*/) const
   { return (Real)0.0; }
 
 protected:
diff --git a/src/Mod/Path/Gui/TaskDlgPathCompound.cpp b/src/Mod/Path/Gui/TaskDlgPathCompound.cpp
index 430c35cea..678c48ca3 100644
--- a/src/Mod/Path/Gui/TaskDlgPathCompound.cpp
+++ b/src/Mod/Path/Gui/TaskDlgPathCompound.cpp
@@ -53,7 +53,7 @@ using namespace Gui;
 //++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 
 TaskWidgetPathCompound::TaskWidgetPathCompound(ViewProviderPathCompound *CompoundView,QWidget *parent)
-    : TaskBox(Gui::BitmapFactory().pixmap("Path-Compound"),tr("Compound paths"),true, parent),CompoundView(CompoundView)
+    : TaskBox(Gui::BitmapFactory().pixmap("Path-Compound"),tr("Compound paths"),true, parent)
 {
     // we need a separate container widget to add all controls to
     proxy = new QWidget(this);
diff --git a/src/Mod/Path/Gui/TaskDlgPathCompound.h b/src/Mod/Path/Gui/TaskDlgPathCompound.h
index cfb829495..a776046e5 100644
--- a/src/Mod/Path/Gui/TaskDlgPathCompound.h
+++ b/src/Mod/Path/Gui/TaskDlgPathCompound.h
@@ -52,7 +52,6 @@ protected:
 private:
     QWidget* proxy;
     Ui_TaskDlgPathCompound* ui;
-    ViewProviderPathCompound *CompoundView;
 };
 
 /// Task Dialog