diff --git a/notebooks/AGIPD/AGIPD_Correct_and_Verify_Summary_NBC.ipynb b/notebooks/AGIPD/AGIPD_Correct_and_Verify_Summary_NBC.ipynb
index 5ba5cf50a1ed14dc7309c05959f8cd8c4a37ce17..cd74bac4b030265417dd23451d3338c0b1428909 100644
--- a/notebooks/AGIPD/AGIPD_Correct_and_Verify_Summary_NBC.ipynb
+++ b/notebooks/AGIPD/AGIPD_Correct_and_Verify_Summary_NBC.ipynb
@@ -101,7 +101,9 @@
     "            timestamp = const_data[const]\n",
     "            table_data.setdefault(timestamp, []).append(f\"{seq}:{mod}\")\n",
     "    table = []\n",
-    "    if len(table_data) == 1:\n",
+    "    if len(table_data) == 0:\n",
+    "        table.append([\"No constants retrieved\"])\n",
+    "    elif len(table_data) == 1:\n",
     "        table.append([[*table_data][0], \"All modules\"])\n",
     "    else:\n",
     "        for timestamp, seqmod in table_data.items():\n",