diff --git a/src/calng/base_correction.py b/src/calng/base_correction.py
index 42e9c95c812e84bdc6bb5953bead37bca0dab362..9a18a0186246ba81eaf2474eb3884dd32ea8e8d4 100644
--- a/src/calng/base_correction.py
+++ b/src/calng/base_correction.py
@@ -936,13 +936,12 @@ class BaseCorrection(PythonDevice):
             self._train_ratio_tracker.update(train_id)
             cell_table = data_hash.get(self._cell_table_path)
             if (
-                    (isinstance(cell_table, np.ndarray) and cell_table.size == 0)
-                    or len(cell_table) == 0
-            ):
-                self.log_status_warn(
-                    "Empty cell table, DAQ probably not sending data."
-                )
+                isinstance(cell_table, np.ndarray)
+                and (len(cell_table.shape) == 0 or cell_table.size == 0)
+            ) or len(cell_table) == 0:
+                self.log_status_warn("Empty cell table, DAQ probably not sending data.")
                 return
+
             cell_table = np.squeeze(cell_table)
 
             # no more common reasons to skip input, so go to processing