diff --git a/src/ifcgeom/kernels/opencascade/IfcGeomShapes.cpp b/src/ifcgeom/kernels/opencascade/IfcGeomShapes.cpp
index 9d86771058..ce6e606e2c 100644
--- a/src/ifcgeom/kernels/opencascade/IfcGeomShapes.cpp
+++ b/src/ifcgeom/kernels/opencascade/IfcGeomShapes.cpp
@@ -848,6 +848,19 @@ bool OpenCascadeKernel::convert(const taxonomy::loop* loop, TopoDS_Wire& wire) {
 
 	for (auto& segment : segments) {
 		auto segment_wire = boost::get<TopoDS_Wire>(convert_curve(this, segment));
+		
+#ifdef IFOPSH_DEBUG
+		std::ostringstream o;
+		segment->print(o);
+		TopoDS_Vertex v0, v1;
+		TopExp::Vertices(segment_wire, v0, v1);
+		gp_Pnt p0 = BRep_Tool::Pnt(v0);
+		gp_Pnt p1 = BRep_Tool::Pnt(v1);
+		o << "p0 " << p0.X() << " " << p0.Y() << " " << p0.Z() << std::endl;
+		o << "p1 " << p1.X() << " " << p1.Y() << " " << p1.Z() << std::endl;
+		auto o_str = o.str();
+		std::wcout << o_str.c_str() << std::endl;
+#endif
 
 		if (!segment->orientation) {
 			segment_wire.Reverse();
diff --git a/src/ifcgeom/schema/mapping.cpp b/src/ifcgeom/schema/mapping.cpp
index 74bc6ffbe5..77d57a6d02 100644
--- a/src/ifcgeom/schema/mapping.cpp
+++ b/src/ifcgeom/schema/mapping.cpp
@@ -1668,13 +1668,14 @@ taxonomy::item* mapping::map_impl(const IfcSchema::IfcTrimmedCurve* inst) {
 	IfcEntityList::ptr trims1 = inst->Trim1();
 	IfcEntityList::ptr trims2 = inst->Trim2();
 
-	unsigned sense_agreement = inst->SenseAgreement() ? 0 : 1;
+	// reversed orientation handling happens in geometry kernel
+	unsigned sense_agreement = 0; // inst->SenseAgreement() ? 0 : 1;
 	double flts[2];
 	taxonomy::point3 pnts[2];
 	bool has_flts[2] = { false,false };
 	bool has_pnts[2] = { false,false };
 
-	tc->orientation = sense_agreement != 0;
+	tc->orientation = inst->SenseAgreement();
 
 	for (IfcEntityList::it it = trims1->begin(); it != trims1->end(); it++) {
 		IfcUtil::IfcBaseClass* i = *it;
diff --git a/src/ifcgeom/schema_agnostic/Converter.cpp b/src/ifcgeom/schema_agnostic/Converter.cpp
index 148aa6cdfe..b037ad6c29 100644
--- a/src/ifcgeom/schema_agnostic/Converter.cpp
+++ b/src/ifcgeom/schema_agnostic/Converter.cpp
@@ -58,7 +58,15 @@ ifcopenshell::geometry::NativeElement* ifcopenshell::geometry::Converter::create
 	auto place = taxonomy::matrix4();
 	std::swap(place, product_node->matrix);
 
-	kernel_->convert(product_node, shapes);
+	try {
+		kernel_->convert(product_node, shapes);
+	} catch (...) {
+		std::ostringstream oss;
+		product_node->print(oss);
+		std::string s = oss.str();
+		std::wcout << s.c_str() << std::endl;
+		return nullptr;
+	}
 
 	shape = new ifcopenshell::geometry::Representation::BRep(s, representation_id_builder.str(), shapes);
 
diff --git a/src/ifcgeom/taxonomy.h b/src/ifcgeom/taxonomy.h
index 22d4738cb2..98a8da2ca7 100644
--- a/src/ifcgeom/taxonomy.h
+++ b/src/ifcgeom/taxonomy.h
@@ -62,7 +62,8 @@ struct eigen_base {
 
 	void print_impl(std::ostream& o, const std::string& class_name, int indent = 0) const {
 		o << std::string(indent, ' ') << class_name;
-		for (size_t i = 0; i < 16; ++i) {
+		int n = T::RowsAtCompileTime * T::ColsAtCompileTime;
+		for (size_t i = 0; i < n; ++i) {
 			o << " " << (*components)(i);
 		}
 		o << std::endl;
@@ -188,14 +189,19 @@ struct direction3 : public cartesian_base<3> {
 	direction3(double x = 0., double y = 0., double z = 0.) : cartesian_base(x, y, z) {}
 };
 
-struct curve : public geom_item {};
+struct curve : public geom_item {
+	void print_impl(std::ostream& o, const std::string& classname, int indent = 0) const {
+		o << std::string(indent, ' ') << classname << std::endl;
+		this->matrix.print(o, indent + 4);
+	}
+};
 
 struct line : public curve {
 	virtual item* clone() const { return new line(*this); }
 	virtual kinds kind() const { return LINE; }
 
 	void print(std::ostream& o, int indent = 0) const {
-		o << "not implemented";
+		print_impl(o, "line", indent);
 	}
 };
 
@@ -206,7 +212,7 @@ struct circle : public curve {
 	virtual kinds kind() const { return CIRCLE; }
 
 	void print(std::ostream& o, int indent = 0) const {
-		o << "not implemented";
+		print_impl(o, "circle", indent);
 	}
 };
 
@@ -217,7 +223,7 @@ struct ellipse : public circle {
 	virtual kinds kind() const { return ELLIPSE; }
 
 	void print(std::ostream& o, int indent = 0) const {
-		o << "not implemented";
+		print_impl(o, "ellipse", indent);
 	}
 };
 
@@ -226,7 +232,7 @@ struct bspline_curve : public curve {
 	virtual kinds kind() const { return BSPLINE_CURVE; }
 
 	void print(std::ostream& o, int indent = 0) const {
-		o << "not implemented";
+		o << std::string(indent, ' ') << "bspline curve" << std::endl;
 	}
 };
 
@@ -251,6 +257,20 @@ struct trimmed_curve : public curve {
 		if (basis) {
 			basis->print(o, indent + 4);
 		}
+
+		const boost::variant<point3, double> const * start_end[2] = { &start, &end };
+		for (int i = 0; i < 2; ++i) {
+			o << std::string(indent + 4, ' ') << (i == 0 ? "start" : "end") << std::endl;
+			if (start_end[i]->which() == 0) {
+				boost::get<point3>(*start_end[i]).print(o, indent + 4);
+			} else if (start_end[i]->which() == 1) {
+				o << std::string(indent + 4, ' ') << "parameter " << boost::get<double>(*start_end[i]) << std::endl;
+			}
+		}
+
+		if (this->instance) {
+			o << std::string(indent, ' ') << this->instance->data().toString() << std::endl;
+		}
 	}
 };