diff --git a/notebooks/ePix100/Correction_ePix100_NBC.ipynb b/notebooks/ePix100/Correction_ePix100_NBC.ipynb
index 0a0fec78db5caf630f3a823ae46db4bbf71915e2..1fef42f02e397998348955572ed8c55f422b6e2e 100644
--- a/notebooks/ePix100/Correction_ePix100_NBC.ipynb
+++ b/notebooks/ePix100/Correction_ePix100_NBC.ipynb
@@ -99,7 +99,7 @@
     "from XFELDetAna import xfelpycaltools as xcal\n",
     "from cal_tools import h5_copy_except\n",
     "from cal_tools.epix100 import epix100lib\n",
-    "from cal_tools.calcat_interface import CalCatError, EPIX100_CalibrationData\n",
+    "from cal_tools.calcat_interface import EPIX100_CalibrationData\n",
     "from cal_tools.tools import (\n",
     "    calcat_creation_time,\n",
     "    load_constants_dict,\n",
@@ -286,6 +286,7 @@
     "        in_vacuum=in_vacuum,\n",
     "        source_energy=gain_photon_energy,\n",
     "        event_at=creation_time,\n",
+    "        snapshot_at=creation_time,\n",
     "    )\n",
     "    const_data = epix_cal.ndarray_map(calibrations=constant_names)[karabo_da]\n",
     "\n",
diff --git a/notebooks/ePix100/ePix100_retrieve_constants_precorrection.ipynb b/notebooks/ePix100/ePix100_retrieve_constants_precorrection.ipynb
index cc37766bb69b063971eddf5e5363d8e3164ff7ee..d788555091895816de6f1b098e7cb32a8e9a836a 100644
--- a/notebooks/ePix100/ePix100_retrieve_constants_precorrection.ipynb
+++ b/notebooks/ePix100/ePix100_retrieve_constants_precorrection.ipynb
@@ -57,7 +57,7 @@
     "from extra_data import RunDirectory\n",
     "from pathlib import Path\n",
     "\n",
-    "from cal_tools.calcat_interface import CalCatError, EPIX100_CalibrationData\n",
+    "from cal_tools.calcat_interface import EPIX100_CalibrationData\n",
     "from cal_tools.epix100 import epix100lib\n",
     "from cal_tools.tools import (\n",
     "    calcat_creation_time,\n",
@@ -154,6 +154,7 @@
     "    in_vacuum=in_vacuum,\n",
     "    source_energy=gain_photon_energy,\n",
     "    event_at=creation_time,\n",
+    "    snapshot_at=creation_time,\n",
     "    )\n",
     "\n",
     "mdata_dict = {\"constants\": dict()}\n",