diff --git a/src/ifcgeom/schema/mapping.cpp b/src/ifcgeom/schema/mapping.cpp
index d904f9e5d9..748339388f 100644
--- a/src/ifcgeom/schema/mapping.cpp
+++ b/src/ifcgeom/schema/mapping.cpp
@@ -155,6 +155,26 @@ taxonomy::item* mapping::map(const IfcSchema::IfcAxis2Placement3D* inst) {
 	return new taxonomy::matrix4();
 }
 
+taxonomy::item* mapping::map(const IfcSchema::IfcCartesianTransformationOperator2DnonUniform* inst) {
+	// @todo length unit
+	return new taxonomy::matrix4();
+}
+
+taxonomy::item* mapping::map(const IfcSchema::IfcCartesianTransformationOperator3DnonUniform* inst) {
+	// @todo length unit
+	return new taxonomy::matrix4();
+}
+
+taxonomy::item* mapping::map(const IfcSchema::IfcCartesianTransformationOperator2D* inst) {
+	// @todo length unit
+	return new taxonomy::matrix4();
+}
+
+taxonomy::item* mapping::map(const IfcSchema::IfcCartesianTransformationOperator3D* inst) {
+	// @todo length unit
+	return new taxonomy::matrix4();
+}
+
 IfcSchema::IfcProduct::list::ptr mapping::products_represented_by(const IfcSchema::IfcRepresentation* representation) {
 	IfcSchema::IfcProduct::list::ptr products(new IfcSchema::IfcProduct::list);
 
@@ -361,7 +381,7 @@ void mapping::get_representations(std::vector<geometry_conversion_task>& tasks,
 		representations = file_->instances_by_type<IfcSchema::IfcRepresentation>();
 	}
 
-	IfcSchema::IfcRepresentation::list::ptr ok_mapped_representations;
+	IfcSchema::IfcRepresentation::list::ptr ok_mapped_representations(new IfcSchema::IfcRepresentation::list);
 
 	int task_index = 0;
 	
diff --git a/src/ifcgeom/schema/mapping.i b/src/ifcgeom/schema/mapping.i
index 4fb8a158a7..eb6bf0b4f0 100644
--- a/src/ifcgeom/schema/mapping.i
+++ b/src/ifcgeom/schema/mapping.i
@@ -120,10 +120,10 @@ BIND(IfcExtrudedAreaSolid);
 // BIND(IfcAxis2Placement2D);
 BIND(IfcAxis2Placement3D);
 // BIND(IfcAxis1Placement);
-// BIND(IfcCartesianTransformationOperator2DnonUniform);
-// BIND(IfcCartesianTransformationOperator3DnonUniform);
-// BIND(IfcCartesianTransformationOperator2D);
-// BIND(IfcCartesianTransformationOperator3D);
+BIND(IfcCartesianTransformationOperator2DnonUniform);
+BIND(IfcCartesianTransformationOperator3DnonUniform);
+BIND(IfcCartesianTransformationOperator2D);
+BIND(IfcCartesianTransformationOperator3D);
 // BIND(IfcObjectPlacement);
 // BIND(IfcVector);
 // BIND(IfcPlane);