Do not execute button if there is no current record for the screen

sao/src/screen.js

@@ -2041,6 +2041,10 @@
                 }
             };
 
+            if (!this.current_record) {
+                return;
+            }
+
             if (this.current_view) {
                 var selected_records = this.current_view.selected_records;
                 this.current_view.set_value();

tryton/tryton/gui/window/view_form/screen/screen.py

@@ -1257,6 +1257,9 @@ class Screen:
 
     def button(self, button):
         'Execute button on the selected records'
+        if not self.current_record:
+            return
+
         if self.current_view:
             self.current_view.set_value()
             fields = self.current_view.get_fields()