diff --git a/csst_common/data_manager.py b/csst_common/data_manager.py
index d0dabcf15dd75b780c566ef85bd3a481c6cee9c4..77c9c136599ddc18fc712c6349277d5a83545415 100644
--- a/csst_common/data_manager.py
+++ b/csst_common/data_manager.py
@@ -560,11 +560,13 @@ class CsstMsDataManager:
              'shutter': '/crdsroot/references/msc/csst_msc_ms_shutter_11_000001.fits'}
         """
         if self.crds.is_available:
+            print("Grab refs from CRDS ...")
             return self.crds.retry(
                 self.crds.get_refs, 3,
                 file_path=self.l0_detector(detector)
             )
         else:
+            print("Grab refs from local files ...")
             refs = dict()
             if self.datatype == "mbi":
                 ref_types = ["bias", "dark", "ledflat", "shutter"]