diff --git a/dispatch_release_dll_to_qgis.bat b/dispatch_release_dll_to_qgis.bat
index 827aa89..e9b6da1 100644
--- a/dispatch_release_dll_to_qgis.bat
+++ b/dispatch_release_dll_to_qgis.bat
@@ -6,8 +6,8 @@ copy .\doc\qgis_umesh_installation.pdf  "c:\Program Files\Deltares\qgis_umesh\do
 copy .\icons\*.*                        "c:\Program Files\Deltares\qgis_umesh\icons\*.*"
 
 rem copy to Bulletin
-copy "c:\OSGeo4W\apps\qgis\plugins\qgis_umesh.dll"      n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.30.03_qgis_umesh\*.*
-copy .\doc\qgis_umesh_um.pdf                            n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.30.03_qgis_umesh\doc\*.*
-copy .\doc\qgis_umesh_installation.pdf                  n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.30.03_qgis_umesh\doc\*.*
-copy .\icons\*.*                                        n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.30.03_qgis_umesh\icons\*.*
+copy "c:\OSGeo4W\apps\qgis\plugins\qgis_umesh.dll"      n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.38.00_qgis_umesh\*.*
+copy .\doc\qgis_umesh_um.pdf                            n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.38.00_qgis_umesh\doc\*.*
+copy .\doc\qgis_umesh_installation.pdf                  n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.38.00_qgis_umesh\doc\*.*
+copy .\icons\*.*                                        n:\Deltabox\Bulletin\mooiman\programs\QGIS_3.38.00_qgis_umesh\icons\*.*
 rem pause
diff --git a/lib/x64/debug/qgis_analysis.lib b/lib/x64/debug/qgis_analysis.lib
index 788e095..f8dfb9f 100644
Binary files a/lib/x64/debug/qgis_analysis.lib and b/lib/x64/debug/qgis_analysis.lib differ
diff --git a/lib/x64/debug/qgis_core.lib b/lib/x64/debug/qgis_core.lib
index 585bab3..035a717 100644
Binary files a/lib/x64/debug/qgis_core.lib and b/lib/x64/debug/qgis_core.lib differ
diff --git a/lib/x64/debug/qgis_gui.lib b/lib/x64/debug/qgis_gui.lib
index cbd5fa2..fde27ce 100644
Binary files a/lib/x64/debug/qgis_gui.lib and b/lib/x64/debug/qgis_gui.lib differ
diff --git a/lib/x64/release/qgis_analysis.lib b/lib/x64/release/qgis_analysis.lib
index 788e095..f8dfb9f 100644
Binary files a/lib/x64/release/qgis_analysis.lib and b/lib/x64/release/qgis_analysis.lib differ
diff --git a/lib/x64/release/qgis_core.lib b/lib/x64/release/qgis_core.lib
index 585bab3..035a717 100644
Binary files a/lib/x64/release/qgis_core.lib and b/lib/x64/release/qgis_core.lib differ
diff --git a/lib/x64/release/qgis_gui.lib b/lib/x64/release/qgis_gui.lib
index cbd5fa2..fde27ce 100644
Binary files a/lib/x64/release/qgis_gui.lib and b/lib/x64/release/qgis_gui.lib differ
diff --git a/packages/qgis_umesh.vcxproj b/packages/qgis_umesh.vcxproj
index be4b8d1..ed61d1f 100644
--- a/packages/qgis_umesh.vcxproj
+++ b/packages/qgis_umesh.vcxproj
@@ -208,7 +208,7 @@ call ..\scripts\git_insert_hash.cmd .\include qqis_umesh_version.rc</Command>
       <DataExecutionPrevention>
       </DataExecutionPrevention>
       <SubSystem>Console</SubSystem>
-      <GenerateDebugInformation>false</GenerateDebugInformation>
+      <GenerateDebugInformation>true</GenerateDebugInformation>
       <ProgramDatabaseFile>c:\OSGeo4W\apps\qgis\plugins\$(ProjectName).pdb</ProgramDatabaseFile>
     </Link>
     <Bscmake>
diff --git a/packages/src/MyDrawingCanvas.cpp b/packages/src/MyDrawingCanvas.cpp
index 3cc4670..feb91fe 100644
--- a/packages/src/MyDrawingCanvas.cpp
+++ b/packages/src/MyDrawingCanvas.cpp
@@ -892,51 +892,54 @@ void MyCanvas::draw_data_along_edge()
             string var_name = var->var_name;
             struct _mesh1d* mesh1d = m_ugrid_file->get_mesh_1d();
 
-            DataValuesProvider2D<double>std_data_at_node = m_ugrid_file->get_variable_values(var_name);
-            z_value = std_data_at_node.GetValueAtIndex(m_current_step, 0);
-            int length = std_data_at_node.m_numXY;
+            if (mesh1d != nullptr)
+            {
+                DataValuesProvider2D<double>std_data_at_node = m_ugrid_file->get_variable_values(var_name);
+                z_value = std_data_at_node.GetValueAtIndex(m_current_step, 0);
+                int length = std_data_at_node.m_numXY;
 
-            dims = var->dims;
+                dims = var->dims;
 
-            struct _edge* edges = mesh1d->edge[0];
-            this->startDrawing(CACHE_1D);
-            double opacity = mCache_painter->opacity();
-            mCache_painter->setOpacity(m_property->get_opacity());
-            this->setPointSize(13);
-            vector<double> edge_x(2);
-            vector<double> edge_y(2);
-            vector<QColor> edge_color(2);
+                struct _edge* edges = mesh1d->edge[0];
+                this->startDrawing(CACHE_1D);
+                double opacity = mCache_painter->opacity();
+                mCache_painter->setOpacity(m_property->get_opacity());
+                this->setPointSize(13);
+                vector<double> edge_x(2);
+                vector<double> edge_y(2);
+                vector<QColor> edge_color(2);
 
-            double missing_value = var->fill_value;
-            determine_min_max(z_value, length, &m_z_min, &m_z_max, missing_value);
+                double missing_value = var->fill_value;
+                determine_min_max(z_value, length, &m_z_min, &m_z_max, missing_value);
 
-            if (true)  // boolean to draw gradient along line?
-            {
-                for (int j = 0; j < edges->count; j++)
+                if (true)  // boolean to draw gradient along line?
                 {
-                    int p1 = edges->edge_nodes[j][0];
-                    int p2 = edges->edge_nodes[j][1];
-                    edge_x[0] = mesh1d->node[0]->x[p1];
-                    edge_y[0] = mesh1d->node[0]->y[p1];
-                    edge_x[1] = mesh1d->node[0]->x[p2];
-                    edge_y[1] = mesh1d->node[0]->y[p2];
+                    for (int j = 0; j < edges->count; j++)
+                    {
+                        int p1 = edges->edge_nodes[j][0];
+                        int p2 = edges->edge_nodes[j][1];
+                        edge_x[0] = mesh1d->node[0]->x[p1];
+                        edge_y[0] = mesh1d->node[0]->y[p1];
+                        edge_x[1] = mesh1d->node[0]->x[p2];
+                        edge_y[1] = mesh1d->node[0]->y[p2];
 
-                    edge_color[0] = m_ramph->getRgbFromValue(z_value[p1]);
-                    edge_color[1] = m_ramph->getRgbFromValue(z_value[p2]);
+                        edge_color[0] = m_ramph->getRgbFromValue(z_value[p1]);
+                        edge_color[1] = m_ramph->getRgbFromValue(z_value[p2]);
 
-                    this->drawLineGradient(edge_x, edge_y, edge_color);
+                        this->drawLineGradient(edge_x, edge_y, edge_color);
+                    }
                 }
-            }
-            if (false)  // boolean to draw multidot?
-            {
-                m_rgb_color.resize(length);
-                for (int j = 0; j < length; j++)
+                if (false)  // boolean to draw multidot?
                 {
-                    m_rgb_color[j] = m_ramph->getRgbFromValue(z_value[j]);
+                    m_rgb_color.resize(length);
+                    for (int j = 0; j < length; j++)
+                    {
+                        m_rgb_color[j] = m_ramph->getRgbFromValue(z_value[j]);
+                    }
+                    this->drawMultiDot(mesh1d->node[0]->x, mesh1d->node[0]->y, m_rgb_color);
                 }
-                this->drawMultiDot(mesh1d->node[0]->x, mesh1d->node[0]->y, m_rgb_color);
+                mCache_painter->setOpacity(opacity);
             }
-            mCache_painter->setOpacity(opacity);
         }
     }
 }