diff --git a/src/laybasic/layCellView.cc b/src/laybasic/layCellView.cc
index 86e4bd46d..0736fdb6f 100644
--- a/src/laybasic/layCellView.cc
+++ b/src/laybasic/layCellView.cc
@@ -217,7 +217,11 @@ void
 LayoutHandle::set_tech_name (const std::string &tn)
 {
   if (tn != m_tech_name) {
-    m_tech_name = tn;
+    if (lay::Technologies::instance ()->has_technology (tn)) {
+      m_tech_name = tn;
+    } else {
+      m_tech_name = std::string ();
+    }
     technology_changed_event ();
   }
 }
diff --git a/src/laybasic/layLayoutView.cc b/src/laybasic/layLayoutView.cc
index 06c674f3c..c5aa79673 100644
--- a/src/laybasic/layLayoutView.cc
+++ b/src/laybasic/layLayoutView.cc
@@ -3124,6 +3124,9 @@ LayoutView::load_layout (const std::string &filename, const db::LoadLayoutOption
   }
   update_content ();
 
+  //  this event may not be generated otherwise:
+  active_cellview_changed (cv_index);
+
   return cv_index;
 }