diff --git a/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py b/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
index b42e3b6..e671af1 100644
--- a/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
+++ b/csaxs_bec/devices/epics/mcs_card/mcs_card_csaxs.py
@@ -406,9 +406,10 @@ class MCSCardCSAXS(PSIDeviceBase, MCSCard):
         while not self._scan_done_thread_kill_event.is_set():
             while self._start_monitor_async_data_emission.wait():
                 try:
-                    if self._current_data_index == self.scan_info.msg.num_points:
-                        for callback in self._scan_done_callbacks:
-                            callback(exception=None)
+                    if self.scan_info is not None:
+                        if self._current_data_index == self.scan_info.msg.num_points:
+                            for callback in self._scan_done_callbacks:
+                                callback(exception=None)
                     time.sleep(0.02)  # 20ms delay to avoid busy loop
                 except Exception as exc:  # pylint: disable=broad-except
                     content = traceback.format_exc()