diff --git a/src/db/db/dbAsIfFlatEdgePairs.cc b/src/db/db/dbAsIfFlatEdgePairs.cc
index 4ed4ee3e9..630804648 100644
--- a/src/db/db/dbAsIfFlatEdgePairs.cc
+++ b/src/db/db/dbAsIfFlatEdgePairs.cc
@@ -43,6 +43,12 @@ AsIfFlatEdgePairs::AsIfFlatEdgePairs ()
   //  .. nothing yet ..
 }
 
+AsIfFlatEdgePairs::AsIfFlatEdgePairs (const AsIfFlatEdgePairs &other)
+  : EdgePairsDelegate (other), m_bbox_valid (other.m_bbox_valid), m_bbox (other.m_bbox)
+{
+  //  .. nothing yet ..
+}
+
 AsIfFlatEdgePairs::~AsIfFlatEdgePairs ()
 {
   //  .. nothing yet ..
diff --git a/src/db/db/dbAsIfFlatEdgePairs.h b/src/db/db/dbAsIfFlatEdgePairs.h
index d379cefbb..d467a5439 100644
--- a/src/db/db/dbAsIfFlatEdgePairs.h
+++ b/src/db/db/dbAsIfFlatEdgePairs.h
@@ -38,6 +38,7 @@ class DB_PUBLIC AsIfFlatEdgePairs
 {
 public:
   AsIfFlatEdgePairs ();
+  AsIfFlatEdgePairs (const AsIfFlatEdgePairs &other);
   virtual ~AsIfFlatEdgePairs ();
 
   virtual size_t size () const;
diff --git a/src/db/db/dbAsIfFlatEdges.cc b/src/db/db/dbAsIfFlatEdges.cc
index 588eaf462..3a0cc5405 100644
--- a/src/db/db/dbAsIfFlatEdges.cc
+++ b/src/db/db/dbAsIfFlatEdges.cc
@@ -59,6 +59,12 @@ AsIfFlatEdges::~AsIfFlatEdges ()
   //  .. nothing yet ..
 }
 
+AsIfFlatEdges::AsIfFlatEdges (const AsIfFlatEdges &other)
+  : EdgesDelegate (other), m_bbox_valid (false)
+{
+  operator= (other);
+}
+
 AsIfFlatEdges &
 AsIfFlatEdges::operator= (const AsIfFlatEdges &other)
 {
diff --git a/src/db/db/dbAsIfFlatEdges.h b/src/db/db/dbAsIfFlatEdges.h
index 55c79ade0..57e2d0fd7 100644
--- a/src/db/db/dbAsIfFlatEdges.h
+++ b/src/db/db/dbAsIfFlatEdges.h
@@ -186,6 +186,7 @@ protected:
   virtual EdgesDelegate *selected_interacting_generic (const Edges &edges, bool inverse) const;
   virtual EdgesDelegate *selected_interacting_generic (const Region &region, bool inverse) const;
   AsIfFlatEdges &operator= (const AsIfFlatEdges &other);
+  AsIfFlatEdges (const AsIfFlatEdges &other);
 
 private:
   mutable bool m_bbox_valid;
diff --git a/src/db/db/dbAsIfFlatRegion.cc b/src/db/db/dbAsIfFlatRegion.cc
index 047137407..fc4373f16 100644
--- a/src/db/db/dbAsIfFlatRegion.cc
+++ b/src/db/db/dbAsIfFlatRegion.cc
@@ -56,6 +56,12 @@ AsIfFlatRegion::~AsIfFlatRegion ()
   //  .. nothing yet ..
 }
 
+AsIfFlatRegion::AsIfFlatRegion (const AsIfFlatRegion &other)
+  : RegionDelegate (other), m_bbox_valid (false)
+{
+  operator= (other);
+}
+
 AsIfFlatRegion &
 AsIfFlatRegion::operator= (const AsIfFlatRegion &other)
 {
diff --git a/src/db/db/dbAsIfFlatRegion.h b/src/db/db/dbAsIfFlatRegion.h
index 631026f4d..ed7b53227 100644
--- a/src/db/db/dbAsIfFlatRegion.h
+++ b/src/db/db/dbAsIfFlatRegion.h
@@ -273,6 +273,7 @@ protected:
   static void produce_markers_for_angle_check (const db::Polygon &poly, const Trans &tr, double min, double max, bool inverse, db::Shapes &shapes);
 
   AsIfFlatRegion &operator= (const AsIfFlatRegion &other);
+  AsIfFlatRegion (const AsIfFlatRegion &other);
 
 private:
 
diff --git a/src/db/db/dbAsIfFlatTexts.cc b/src/db/db/dbAsIfFlatTexts.cc
index fe9c86da3..391341ea7 100644
--- a/src/db/db/dbAsIfFlatTexts.cc
+++ b/src/db/db/dbAsIfFlatTexts.cc
@@ -46,6 +46,12 @@ AsIfFlatTexts::AsIfFlatTexts ()
   //  .. nothing yet ..
 }
 
+AsIfFlatTexts::AsIfFlatTexts (const AsIfFlatTexts &other)
+  : TextsDelegate (other), m_bbox_valid (other.m_bbox_valid), m_bbox (other.m_bbox)
+{
+  //  .. nothing yet ..
+}
+
 AsIfFlatTexts::~AsIfFlatTexts ()
 {
   //  .. nothing yet ..
diff --git a/src/db/db/dbAsIfFlatTexts.h b/src/db/db/dbAsIfFlatTexts.h
index b0f4611fe..6fec9911d 100644
--- a/src/db/db/dbAsIfFlatTexts.h
+++ b/src/db/db/dbAsIfFlatTexts.h
@@ -40,6 +40,7 @@ class DB_PUBLIC AsIfFlatTexts
 {
 public:
   AsIfFlatTexts ();
+  AsIfFlatTexts (const AsIfFlatTexts &other);
   virtual ~AsIfFlatTexts ();
 
   virtual size_t size () const;
diff --git a/src/db/db/dbInit.cc b/src/db/db/dbInit.cc
index 49cbac25e..b84592a9e 100644
--- a/src/db/db/dbInit.cc
+++ b/src/db/db/dbInit.cc
@@ -151,7 +151,7 @@ void init (const std::vector<std::string> &_paths)
         try {
           s_plugins.push_back (load_plugin (imp));
           modules.insert (*im);
-        } catch (tl::Exception (&ex)) {
+        } catch (tl::Exception &ex) {
           tl::error << ex.msg ();
         }
       }
diff --git a/src/db/db/dbLayoutDiff.cc b/src/db/db/dbLayoutDiff.cc
index b51ef097f..c3b778abc 100644
--- a/src/db/db/dbLayoutDiff.cc
+++ b/src/db/db/dbLayoutDiff.cc
@@ -1259,7 +1259,7 @@ PrintingDifferenceReceiver::dbu_differs (double dbu_a, double dbu_b)
 {
   try {
     enough (tl::error) << "Database units differ " << dbu_a << " vs. " << dbu_b;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1269,7 +1269,7 @@ PrintingDifferenceReceiver::layer_in_a_only (const db::LayerProperties &la)
 {
   try {
     enough (tl::error) << "Layer " << la.to_string () << " is not present in layout b, but in a";
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1279,7 +1279,7 @@ PrintingDifferenceReceiver::layer_in_b_only (const db::LayerProperties &lb)
 {
   try {
     enough (tl::error) << "Layer " << lb.to_string () << " is not present in layout a, but in b";
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1290,7 +1290,7 @@ PrintingDifferenceReceiver::layer_name_differs (const db::LayerProperties &la, c
   try {
     enough (tl::error) << "Layer names differ between layout a and b for layer " << la.layer << "/" << la.datatype << ": "
                        << la.name << " vs. " << lb.name;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1300,7 +1300,7 @@ PrintingDifferenceReceiver::cell_in_a_only (const std::string &cellname, db::cel
 {
   try {
     enough (tl::error) << "Cell " << cellname << " is not present in layout b, but in a";
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1310,7 +1310,7 @@ PrintingDifferenceReceiver::cell_in_b_only (const std::string &cellname, db::cel
 {
   try {
     enough (tl::error) << "Cell " << cellname << " is not present in layout a, but in b";
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1320,7 +1320,7 @@ PrintingDifferenceReceiver::cell_name_differs (const std::string &cellname_a, db
 {
   try {
     enough (tl::error) << "Cell " << cellname_a << " in a is renamed to " << cellname_b << " in b";
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1330,7 +1330,7 @@ PrintingDifferenceReceiver::bbox_differs (const db::Box &ba, const db::Box &bb)
 {
   try {
     enough (tl::error) << "Bounding boxes differ for cell " << m_cellname << ", " << ba.to_string () << " vs. " << bb.to_string ();
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1346,7 +1346,7 @@ PrintingDifferenceReceiver::begin_inst_differences ()
 {
   try {
     enough (tl::error) << "Instances differ in cell " << m_cellname;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1369,7 +1369,7 @@ PrintingDifferenceReceiver::instances_in_a_only (const std::vector <db::CellInst
     for (std::vector <db::CellInstArrayWithProperties>::const_iterator s = anotb.begin (); s != anotb.end (); ++s) {
       print_cell_inst (*s, a);
     }
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1382,7 +1382,7 @@ PrintingDifferenceReceiver::instances_in_b_only (const std::vector <db::CellInst
     for (std::vector <db::CellInstArrayWithProperties>::const_iterator s = bnota.begin (); s != bnota.end (); ++s) {
       print_cell_inst (*s, b);
     }
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1404,7 +1404,7 @@ PrintingDifferenceReceiver::per_layer_bbox_differs (const db::Box &ba, const db:
   try {
     enough (tl::error) << "Per-layer bounding boxes differ for cell " << m_cellname << ", layer (" << m_layer.to_string () << "), "
                        << ba.to_string () << " vs. " << bb.to_string ();
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1414,7 +1414,7 @@ PrintingDifferenceReceiver::begin_polygon_differences ()
 {
   try {
     enough (tl::error) << "Polygons differ for layer " << m_layer.to_string () << " in cell " << m_cellname;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1427,7 +1427,7 @@ PrintingDifferenceReceiver::detailed_diff (const db::PropertiesRepository &pr, c
     print_diffs (pr, a, b);
     enough (tl::info) << "Not in a but in b:";
     print_diffs (pr, b, a);
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1442,7 +1442,7 @@ PrintingDifferenceReceiver::begin_path_differences ()
 {
   try {
     enough (tl::error) << "Paths differ for layer " << m_layer.to_string () << " in cell " << m_cellname;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1455,7 +1455,7 @@ PrintingDifferenceReceiver::detailed_diff (const db::PropertiesRepository &pr, c
     print_diffs (pr, a, b);
     enough (tl::info) << "Not in a but in b:";
     print_diffs (pr, b, a);
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1470,7 +1470,7 @@ PrintingDifferenceReceiver::begin_box_differences ()
 {
   try {
     enough (tl::error) << "Boxes differ for layer " << m_layer.to_string () << " in cell " << m_cellname;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1483,7 +1483,7 @@ PrintingDifferenceReceiver::detailed_diff (const db::PropertiesRepository &pr, c
     print_diffs (pr, a, b);
     enough (tl::info) << "Not in a but in b:";
     print_diffs (pr, b, a);
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1498,7 +1498,7 @@ PrintingDifferenceReceiver::begin_edge_differences ()
 {
   try {
     enough (tl::error) << "Edges differ for layer " << m_layer.to_string () << " in cell " << m_cellname;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1511,7 +1511,7 @@ PrintingDifferenceReceiver::detailed_diff (const db::PropertiesRepository &pr, c
     print_diffs (pr, a, b);
     enough (tl::info) << "Not in a but in b:";
     print_diffs (pr, b, a);
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1526,7 +1526,7 @@ PrintingDifferenceReceiver::begin_text_differences ()
 {
   try {
     enough (tl::error) << "Texts differ for layer " << m_layer.to_string () << " in cell " << m_cellname;
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
@@ -1539,7 +1539,7 @@ PrintingDifferenceReceiver::detailed_diff (const db::PropertiesRepository &pr, c
     print_diffs (pr, a, b);
     enough (tl::info) << "Not in a but in b:";
     print_diffs (pr, b, a);
-  } catch (tl::CancelException) {
+  } catch (tl::CancelException &) {
     //  ignore cancel exceptions
   }
 }
diff --git a/src/db/db/dbMatrix.h b/src/db/db/dbMatrix.h
index fd1fb704c..e76c1e4ae 100644
--- a/src/db/db/dbMatrix.h
+++ b/src/db/db/dbMatrix.h
@@ -97,14 +97,6 @@ public:
     // .. nothing yet ..
   }
 
-  /**
-   *  @brief Copy ctor
-   */
-  Matrix2d (const Matrix2d &d)
-  {
-    *this = d;
-  }
-
   /**
    *  @brief Make a matrix from a transformation
    */
@@ -522,14 +514,6 @@ public:
     set (d, 0.0, 0.0, 0.0, d, 0.0, 0.0, 0.0, 1.0);
   }
 
-  /**
-   *  @brief Copy ctor
-   */
-  Matrix3d (const Matrix3d &d)
-  {
-    *this = d;
-  }
-
   /**
    *  @brief Add operator
    */
diff --git a/src/db/db/dbPoint.h b/src/db/db/dbPoint.h
index e312d1564..69b9a23ba 100644
--- a/src/db/db/dbPoint.h
+++ b/src/db/db/dbPoint.h
@@ -83,6 +83,18 @@ public:
    */
   point (const point<C> &d) : m_x (d.x ()), m_y (d.y ()) { }
 
+  /**
+   *  @brief Assignment
+   *
+   *  @param d The source from which to take the data
+   */
+  point &operator= (const point<C> &d) 
+  {
+    m_x = d.x ();
+    m_y = d.y ();
+    return *this;
+  }
+
   /**
    *  @brief The copy constructor that also converts
    *
@@ -94,6 +106,21 @@ public:
   template <class D>
   explicit point (const point<D> &d) : m_x (coord_traits::rounded (d.x ())), m_y (coord_traits::rounded (d.y ())) { }
 
+  /**
+   *  @brief Assignment which also converts
+   *
+   *  This assignment operator will convert the coordinate types if possibel
+   *
+   *  @param d The source from which to take the data
+   */
+  template <class D>
+  point &operator= (const point<C> &d) 
+  {
+    m_x = coord_traits::rounded (d.x ());
+    m_y = coord_traits::rounded (d.y ());
+    return *this;
+  }
+
   /**
    *  @brief Add to operation
    */
diff --git a/src/db/db/dbShape.cc b/src/db/db/dbShape.cc
index 71e33c35e..667e354b2 100644
--- a/src/db/db/dbShape.cc
+++ b/src/db/db/dbShape.cc
@@ -338,7 +338,7 @@ Shape::simple_polygon_ref_type Shape::simple_polygon_ref () const
 {
   if (m_type == SimplePolygonRef) {
     return *basic_ptr (simple_polygon_ref_type::tag ());
-  } else if (SimplePolygonPtrArrayMember) {
+  } else if (m_type == SimplePolygonPtrArrayMember) {
     tl_assert (m_trans.rot () == 0);
     return simple_polygon_ref_type (&basic_ptr (simple_polygon_ptr_array_type::tag ())->object ().obj (), m_trans.disp ());
   } else {
diff --git a/src/db/db/dbShapeRepository.h b/src/db/db/dbShapeRepository.h
index b6cd89660..d80d64c68 100644
--- a/src/db/db/dbShapeRepository.h
+++ b/src/db/db/dbShapeRepository.h
@@ -67,15 +67,6 @@ public:
     //  .. nothing yet ..
   }
 
-  /** 
-   *  @brief The copy constructor
-   */
-  repository (const repository<Sh> &d)
-    : m_set (d.m_set)
-  {
-    //  .. nothing yet ..
-  }
-
   /**
    *  @brief Insert a shape into the repository
    *
diff --git a/src/db/db/dbTrans.h b/src/db/db/dbTrans.h
index ecc9a3d56..616296200 100644
--- a/src/db/db/dbTrans.h
+++ b/src/db/db/dbTrans.h
@@ -150,11 +150,19 @@ struct unit_trans
     // .. nothing else ..
   }
 
+  /**
+   *  @brief Copy ctor (which basically does nothing)
+   */
+  unit_trans (const unit_trans<C> &)
+  {
+    // .. nothing else ..
+  }
+
   /**
    *  @brief Copy ctor (which basically does nothing)
    */
   template <class D>
-  explicit unit_trans (const unit_trans<D> &)
+  unit_trans (const unit_trans<D> &)
   {
     // .. nothing else ..
   }
@@ -240,6 +248,15 @@ struct unit_trans
     return *this;
   }
 
+  /**
+   *  @brief Assignment (which basically does nothing)
+   */
+  template <class D>
+  unit_trans &operator= (const unit_trans<D> &) 
+  {
+    return *this;
+  }
+
   /**
    *  @brief Inversion
    */
@@ -730,12 +747,21 @@ public:
   /**
    *  @brief The "conversion" from the unit transformation to a displacement
    */
-  explicit disp_trans (unit_trans<C>)
+  disp_trans (unit_trans<C>)
     : m_u ()
   {
     // .. nothing else ..
   }
 
+  /**
+   *  @brief The copy constructor 
+   *
+   *  @param d The source from which to copy
+   */
+  disp_trans (const disp_trans<C> &d)
+    : m_u (d.disp ())
+  { }
+
   /**
    *  @brief The copy constructor that converts also
    *
@@ -745,7 +771,7 @@ public:
    *  @param d The source from which to copy
    */
   template <class D>
-  explicit disp_trans (const disp_trans<D> &d)
+  disp_trans (const disp_trans<D> &d)
     : m_u (d.disp ())
   { }
 
@@ -779,6 +805,25 @@ public:
     // .. nothing else ..
   }
 
+  /**
+   *  @brief Assignment
+   */
+  disp_trans &operator= (const disp_trans<C> &d)
+  {
+    m_u = d.disp ();
+    return *this;
+  }
+
+  /**
+   *  @brief Assignment with type conversion
+   */
+  template <class D>
+  disp_trans &operator= (const disp_trans<D> &d)
+  {
+    m_u = d.disp ();
+    return *this;
+  }
+
   /**
    *  @brief Returns true, if the transformation is unity
    */
@@ -1090,6 +1135,18 @@ public:
     : fixpoint_trans<C> (d.rot ()), m_u (d.disp ())
   { }
 
+  /**
+   *  @brief Assignment
+   *
+   *  @param d The source from which to take the data
+   */
+  simple_trans &operator= (const simple_trans<C> &d)
+  { 
+    fixpoint_trans<C>::operator= (d);
+    m_u = d.disp ();
+    return *this;
+  }
+
   /**
    *  @brief The copy constructor that converts to a different coordinate type also
    *
@@ -1103,6 +1160,22 @@ public:
     : fixpoint_trans<C> (d.rot ()), m_u (d.disp ())
   { }
 
+  /**
+   *  @brief Assignment which also converts
+   *
+   *  This assignment implementation will also convert
+   *  between different coordinate types if possible.
+   *
+   *  @param d The source from which to take the data
+   */
+  template <class D>
+  simple_trans &operator= (const simple_trans<D> &d)
+  { 
+    fixpoint_trans<C>::operator= (d);
+    m_u = d.disp ();
+    return *this;
+  }
+
   /**
    *  @brief The standard constructor using angle and mirror flag
    *
diff --git a/src/db/db/dbVector.h b/src/db/db/dbVector.h
index b2eeffac2..d51323d43 100644
--- a/src/db/db/dbVector.h
+++ b/src/db/db/dbVector.h
@@ -126,6 +126,18 @@ public:
     //  .. nothing yet ..
   }
 
+  /**
+   *  @brief Assignment
+   *
+   *  @param d The source from which to take the data
+   */
+  vector &operator= (const vector<C> &d) 
+  {
+    m_x = d.x ();
+    m_y = d.y ();
+    return *this;
+  }
+
   /**
    *  @brief The copy constructor that converts also
    *
@@ -141,6 +153,21 @@ public:
     //  .. nothing yet ..
   }
 
+  /**
+   *  @brief Assignment which also converts
+   *
+   *  This assignment operator will convert the coordinate types if possibel
+   *
+   *  @param d The source from which to take the data
+   */
+  template <class D>
+  vector &operator= (const point<C> &d) 
+  {
+    m_x = coord_traits::rounded (d.x ());
+    m_y = coord_traits::rounded (d.y ());
+    return *this;
+  }
+
   /**
    *  @brief Add to operation
    */
diff --git a/src/db/db/gsiDeclDbLayoutToNetlist.cc b/src/db/db/gsiDeclDbLayoutToNetlist.cc
index c143ffbb4..3c0b85fd0 100644
--- a/src/db/db/gsiDeclDbLayoutToNetlist.cc
+++ b/src/db/db/gsiDeclDbLayoutToNetlist.cc
@@ -248,9 +248,9 @@ Class<db::LayoutToNetlist> decl_dbLayoutToNetlist ("db", "LayoutToNetlist",
   gsi::method ("layer_name", (std::string (db::LayoutToNetlist::*) (unsigned int) const) &db::LayoutToNetlist::name, gsi::arg ("l"),
     "@brief Gets the name of the given layer (by index)\n"
   ) +
-  gsi::method ("register", (void (db::LayoutToNetlist::*) (const db::Region &region, const std::string &)) &db::LayoutToNetlist::register_layer, gsi::arg ("l"), gsi::arg ("n"),
+  gsi::method ("register", (void (db::LayoutToNetlist::*) (const db::ShapeCollection &collection, const std::string &)) &db::LayoutToNetlist::register_layer, gsi::arg ("l"), gsi::arg ("n"),
     "@brief Names the given layer\n"
-    "'l' must be a hierarchical region derived with \\make_layer, \\make_text_layer or \\make_polygon_layer or "
+    "'l' must be a hierarchical \\Region or \\Texts object derived with \\make_layer, \\make_text_layer or \\make_polygon_layer or "
     "a region derived from those by boolean operations or other hierarchical operations.\n"
     "\n"
     "Naming a layer allows the system to indicate the layer in various contexts, i.e. "
@@ -258,13 +258,8 @@ Class<db::LayoutToNetlist> decl_dbLayoutToNetlist ("db", "LayoutToNetlist",
     "They are not discarded when the Region object is destroyed.\n"
     "\n"
     "If required, the system will assign a name automatically."
-  ) +
-  gsi::method ("register", (void (db::LayoutToNetlist::*) (const db::Texts &texts, const std::string &)) &db::LayoutToNetlist::register_layer, gsi::arg ("l"), gsi::arg ("n"),
-    "@brief Names the given layer\n"
-    "This method behaves like the one provided for Regions but accepts Texts. "
-    "Texts (hierarchical text collections) are useful to represent labels for naming nets.\n"
     "\n"
-    "This variant has been introduced in version 0.27.\n"
+    "This method has been generalized in version 0.27.\n"
   ) +
   gsi::method_ext ("layer_names", &l2n_layer_names,
     "@brief Returns a list of names of the layer kept inside the LayoutToNetlist object."
diff --git a/src/gsi/gsi/gsiSignals.h b/src/gsi/gsi/gsiSignals.h
index 2cee7d632..38580b452 100644
--- a/src/gsi/gsi/gsiSignals.h
+++ b/src/gsi/gsi/gsiSignals.h
@@ -883,7 +883,7 @@ protected:
   }
 
 private:
-  event_type (X::*mp_event);
+  event_type X::*mp_event;
 };
 
 template <class X, class E, class H, class T>
diff --git a/src/gsi/gsi_test/gsiTest.cc b/src/gsi/gsi_test/gsiTest.cc
index 8b64d6f4b..62d459c47 100644
--- a/src/gsi/gsi_test/gsiTest.cc
+++ b/src/gsi/gsi_test/gsiTest.cc
@@ -423,6 +423,15 @@ X::X (const X &x)
   ++s_xinst;
 }
 
+X &X::operator= (const X &x)
+{
+  gsi::ObjectBase::operator= (x);
+  if (this != &x) {
+    m_s = x.m_s;
+  }
+  return *this;
+}
+
 X::~X ()
 { 
   --s_xinst;
diff --git a/src/gsi/gsi_test/gsiTest.h b/src/gsi/gsi_test/gsiTest.h
index 441a50c4a..62d8243c8 100644
--- a/src/gsi/gsi_test/gsiTest.h
+++ b/src/gsi/gsi_test/gsiTest.h
@@ -1022,6 +1022,7 @@ public:
   X ();
   X (const char *x);
   X (const X &x);
+  X &operator= (const X &x);
   virtual ~X ();
 
   int x1 () const { return 17; }
diff --git a/src/laybasic/laybasic/gsiDeclLayMenu.cc b/src/laybasic/laybasic/gsiDeclLayMenu.cc
index bbb7d77b0..f1417f68a 100644
--- a/src/laybasic/laybasic/gsiDeclLayMenu.cc
+++ b/src/laybasic/laybasic/gsiDeclLayMenu.cc
@@ -154,7 +154,7 @@ Class<lay::AbstractMenu> decl_AbstractMenu ("lay", "AbstractMenu",
     "@param path The path to check\n"
     "@return false if the path is not a valid path to an item\n"
   ) +
-  method ("insert_item", (void (lay::AbstractMenu::*) (const std::string &, const std::string &, const lay::Action &)) &lay::AbstractMenu::insert_item, gsi::arg ("path"), gsi::arg ("name"), gsi::arg ("action"),
+  method ("insert_item", (void (lay::AbstractMenu::*) (const std::string &, const std::string &, const lay::Action *)) &lay::AbstractMenu::insert_item, gsi::arg ("path"), gsi::arg ("name"), gsi::arg ("action"),
     "@brief Inserts a new item before the one given by the path\n"
     "\n"
     "The Action object passed as the third parameter references the handler which both implements the "
diff --git a/src/laybasic/laybasic/layDitherPattern.h b/src/laybasic/laybasic/layDitherPattern.h
index d35b810dd..893257efe 100644
--- a/src/laybasic/laybasic/layDitherPattern.h
+++ b/src/laybasic/laybasic/layDitherPattern.h
@@ -209,7 +209,7 @@ public:
   std::vector<std::string> to_strings () const;
 
 private:
-  uint32_t *(m_pattern[64]);
+  uint32_t *m_pattern[64];
   uint32_t m_buffer [64 * 32];
   unsigned int m_width, m_height;
   unsigned int m_pattern_stride;
diff --git a/src/tl/tl/tlEventsVar.h b/src/tl/tl/tlEventsVar.h
index aef19b862..926cdce76 100644
--- a/src/tl/tl/tlEventsVar.h
+++ b/src/tl/tl/tlEventsVar.h
@@ -115,7 +115,7 @@ public:
   {
     T *t = dynamic_cast<T *> (object);
     if (t) {
-      void *(argv[]) = { _CALLARGPTRS };
+      void *argv[] = { _CALLARGPTRS };
       (t->*m_m) (_COUNT, &(argv[0]));
     }
   }
@@ -145,7 +145,7 @@ public:
   {
     T *t = dynamic_cast<T *> (object);
     if (t) {
-      void *(argv[]) = { _CALLARGPTRS };
+      void *argv[] = { _CALLARGPTRS };
       (t->*m_m) (m_d, _COUNT, &(argv[0]));
     }
   }
diff --git a/src/tl/tl/tlKDTree.h b/src/tl/tl/tlKDTree.h
index fdd2f527e..028de3fac 100644
--- a/src/tl/tl/tlKDTree.h
+++ b/src/tl/tl/tlKDTree.h
@@ -260,10 +260,6 @@ public:
     : m_begin (begin), m_step (step), m_index (index)
   { }
 
-  kd_n_it (const kd_n_it &i)
-    : m_begin (i.m_begin), m_step (i.m_step), m_index (i.m_index)
-  { }
-
   kd_n_it (size_type step, const kd_n_it &i)
     : m_begin (i.m_begin), m_step (step), m_index (i.m_index)
   { }
diff --git a/src/tl/tl/tlVector.h b/src/tl/tl/tlVector.h
index 5fc6757fb..38871ca74 100644
--- a/src/tl/tl/tlVector.h
+++ b/src/tl/tl/tlVector.h
@@ -58,12 +58,23 @@ public:
   /**
    *  @brief Copy constructor
    */
-  explicit vector (const tl::vector<T> &d) : std::vector<T> (d) { }
+  explicit vector (const tl::vector<T> &d) : base (d) { }
+
+  /**
+   *  @brief Assignment
+   */
+  vector &operator= (const tl::vector<T> &d)
+  {
+    if (&d != this) {
+      base::operator= (d);
+    }
+    return *this;
+  }
 
   /**
    *  @brief Initialization with value and length
    */
-  vector (const T &v, int s) : std::vector<T> (v, s) { }
+  vector (const T &v, int s) : base (v, s) { }
 };
 
 /**