--- gigedit/trunk/src/gigedit/mainwindow.cpp	2020/08/14 12:18:26	3813
+++ gigedit/trunk/src/gigedit/mainwindow.cpp	2020/08/14 12:29:01	3814
@@ -5442,7 +5442,9 @@
         Glib::RefPtr<Gtk::TreeSelection> sel = m_TreeViewInstruments.get_selection();
         std::vector<Gtk::TreeModel::Path> rows = sel->get_selected_rows();
         for (int r = 0; r < rows.size(); ++r) {
-            Gtk::TreeModel::iterator it = m_refInstrumentsTreeModel->get_iter(rows[r]);
+            // convert index of visual selection (i.e. if filtered) to index of model
+            Gtk::TreeModel::Path path = m_refInstrumentsModelFilter->convert_path_to_child_path(rows[r]);
+            Gtk::TreeModel::iterator it = m_refInstrumentsTreeModel->get_iter(path);
             if (it) {
                 Gtk::TreeModel::Row row = *it;
                 int index = row[m_InstrumentsModel.m_col_nr];