diff --git a/notebooks/LPD/LPDChar_Darks_NBC.ipynb b/notebooks/LPD/LPDChar_Darks_NBC.ipynb
index 9ba4365fc8dbeb086ce84c31800870f78225a5fc..f7924cdb20c4a36821132fa5ad7856f20206bf85 100644
--- a/notebooks/LPD/LPDChar_Darks_NBC.ipynb
+++ b/notebooks/LPD/LPDChar_Darks_NBC.ipynb
@@ -183,7 +183,7 @@
     "\n",
     "# the actual characterization\n",
     "def characterize_module(run_path, channel, gg):\n",
-    "    run = RunDirectory(run_path)\n",
+    "    run = RunDirectory(run_path, parallelize=False)\n",
     "    det_source = source_name.format(karabo_id, channel)\n",
     "    data = run[det_source, 'image.data'].drop_empty_trains()\n",
     "    data = data[skip_first_ntrains : skip_first_ntrains + ntrains]\n",