object_print3d_utils/export.py

@@ -72,6 +72,11 @@ def write_mesh(context, report_cb):
     obj = layer.objects.active
     export_data_layers = print_3d.use_data_layers
 
+    # Make sure at least one object is selected
+    if not context.selected_objects:
+        report_cb({'ERROR'}, "No objects selected")
+        return False
+
     # Create name 'export_path/blendname-objname'
     # add the filename component
     if bpy.data.is_saved: