diff --git a/src/libslic3r/SLA/SLASupportTree.cpp b/src/libslic3r/SLA/SLASupportTree.cpp
index 7adaea1f4..d689324c0 100644
--- a/src/libslic3r/SLA/SLASupportTree.cpp
+++ b/src/libslic3r/SLA/SLASupportTree.cpp
@@ -924,6 +924,11 @@ bool SLASupportTree::generate(const PointSet &points,
         //...
     };
 
+    // Debug:
+    for(int pn = 0; pn < points.rows(); ++pn) {
+        std::cout << "p " << pn << " " << points.row(pn) << std::endl;
+    }
+
     auto filterfn = [] (
             const SupportConfig& cfg,
             const PointSet& points,
@@ -1511,7 +1516,7 @@ bool SLASupportTree::generate(const PointSet &points,
 
     auto progress = [&ctl, &pc, &pc_prev] () {
         static const std::array<std::string, NUM_STEPS> stepstr {
-            "",
+            "Starting",
             "Filtering",
             "Generate pinheads",
             "Classification",
diff --git a/src/libslic3r/SLA/SLASupportTree.hpp b/src/libslic3r/SLA/SLASupportTree.hpp
index f9691b19f..3a1c5ef68 100644
--- a/src/libslic3r/SLA/SLASupportTree.hpp
+++ b/src/libslic3r/SLA/SLASupportTree.hpp
@@ -74,13 +74,16 @@ struct Controller {
 /// An index-triangle structure for libIGL functions. Also serves as an
 /// alternative (raw) input format for the SLASupportTree
 struct EigenMesh3D {
-//    Eigen::MatrixXd V;
-//    Eigen::MatrixXi F;
-    Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::DontAlign> V;
-    Eigen::Matrix<int, Eigen::Dynamic, Eigen::Dynamic, Eigen::DontAlign> F;
+    Eigen::MatrixXd V;
+    Eigen::MatrixXi F;
+
+    // igl crashes with the following data types:
+//    Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::DontAlign> V;
+//    Eigen::Matrix<int, Eigen::Dynamic, Eigen::Dynamic, Eigen::DontAlign> F;
 };
 
-using PointSet = Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::DontAlign>; //Eigen::MatrixXd;
+//using PointSet = Eigen::Matrix<double, Eigen::Dynamic, Eigen::Dynamic, Eigen::DontAlign>; //Eigen::MatrixXd;
+using PointSet = Eigen::MatrixXd;
 
 /* ************************************************************************** */
 /* TODO: May not be needed:                                                   */
diff --git a/src/libslic3r/SLA/SLASupportTreeIGL.cpp b/src/libslic3r/SLA/SLASupportTreeIGL.cpp
index 7de4d196d..c95dcef34 100644
--- a/src/libslic3r/SLA/SLASupportTreeIGL.cpp
+++ b/src/libslic3r/SLA/SLASupportTreeIGL.cpp
@@ -84,11 +84,11 @@ size_t SpatIndex::size() const
 }
 
 PointSet normals(const PointSet& points, const EigenMesh3D& mesh) {
-//    Eigen::VectorXd dists;
-//    Eigen::VectorXi I;
 #ifdef IGL_COMPATIBLE
-    Eigen::Matrix<double, Eigen::Dynamic, 1, Eigen::DontAlign> dists;
-    Eigen::Matrix<int, Eigen::Dynamic, 1, Eigen::DontAlign> I;
+    Eigen::VectorXd dists;
+    Eigen::VectorXi I;
+//    Eigen::Matrix<double, Eigen::Dynamic, 1, Eigen::DontAlign> dists;
+//    Eigen::Matrix<int, Eigen::Dynamic, 1, Eigen::DontAlign> I;
     PointSet C;
 
     igl::point_mesh_squared_distance( points, mesh.V, mesh.F, dists, I, C);
diff --git a/src/libslic3r/SLAPrint.cpp b/src/libslic3r/SLAPrint.cpp
index 939b9ff34..213c3a5c6 100644
--- a/src/libslic3r/SLAPrint.cpp
+++ b/src/libslic3r/SLAPrint.cpp
@@ -66,14 +66,17 @@ void SLAPrint::clear()
 SLAPrint::ApplyStatus SLAPrint::apply(const Model &model,
                                       const DynamicPrintConfig &config)
 {
-	if (m_objects.empty())
-		return APPLY_STATUS_UNCHANGED;
+//	if (m_objects.empty())
+//		return APPLY_STATUS_UNCHANGED;
 
     // Grab the lock for the Print / PrintObject milestones.
 	tbb::mutex::scoped_lock lock(this->cancel_mutex());
+    if(m_objects.empty() && model.objects.empty())
+        return APPLY_STATUS_UNCHANGED;
 
 	// Temporary quick fix, just invalidate everything.
 	{
+        std::cout << "deleting object cache " << std::endl;
         for (SLAPrintObject *print_object : m_objects) {
 			print_object->invalidate_all_steps();
             delete print_object;
@@ -89,7 +92,7 @@ SLAPrint::ApplyStatus SLAPrint::apply(const Model &model,
        		//TODO
             m_objects.emplace_back(new SLAPrintObject(this, model_object));
         }
-	}
+    }
 
 	return APPLY_STATUS_INVALIDATED;
 }
@@ -200,6 +203,8 @@ SLAPrintObject::SLAPrintObject(SLAPrint *print, ModelObject *model_object):
     m_stepmask(slaposCount, true)
 {
     m_supportdata->emesh = sla::to_eigenmesh(*m_model_object);
+    m_supportdata->support_points = sla::support_points(*m_model_object);
+    std::cout << "support points copied " << m_supportdata->support_points.rows() << std::endl;
 }
 
 SLAPrintObject::~SLAPrintObject() {}