diff --git a/Extract_Bibliographic_Info_From_Alma.ipynb b/Extract_Bibliographic_Info_From_Alma.ipynb
index ad5487c62d48e32c3b1b3e21a5c854a8a8cfe97d..0b3de211359835a35273c8c60cddaf2732f339e6 100644
--- a/Extract_Bibliographic_Info_From_Alma.ipynb
+++ b/Extract_Bibliographic_Info_From_Alma.ipynb
@@ -109,7 +109,7 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "mapping = pd.read_csv('mapping.csv')\n",
+    "mapping = pd.read_csv('minimal_mapping.csv')\n",
     "mapping = mapping.where((pd.notnull(mapping)), None)"
    ]
   },
@@ -155,26 +155,26 @@
        "  <tbody>\n",
        "    <tr>\n",
        "      <th>0</th>\n",
-       "      <td>009</td>\n",
+       "      <td>100 1 _ $$a</td>\n",
        "      <td>None</td>\n",
        "      <td>None</td>\n",
-       "      <td>Systemnummer</td>\n",
+       "      <td>Verfasser</td>\n",
        "    </tr>\n",
        "    <tr>\n",
-       "      <th>33</th>\n",
-       "      <td>AVA _ _ $$d ; AVA _ _ $$i ; AVA _ _ $$j</td>\n",
+       "      <th>23</th>\n",
+       "      <td>689 * * $$a</td>\n",
        "      <td>None</td>\n",
-       "      <td>None</td>\n",
-       "      <td>Signatur</td>\n",
+       "      <td>;</td>\n",
+       "      <td>Schlagworte</td>\n",
        "    </tr>\n",
        "  </tbody>\n",
        "</table>\n",
        "</div>"
       ],
       "text/plain": [
-       "                                    pattern selector collector         label\n",
-       "0                                       009     None      None  Systemnummer\n",
-       "33  AVA _ _ $$d ; AVA _ _ $$i ; AVA _ _ $$j     None      None      Signatur"
+       "        pattern selector collector        label\n",
+       "0   100 1 _ $$a     None      None    Verfasser\n",
+       "23  689 * * $$a     None         ;  Schlagworte"
       ]
      },
      "execution_count": 5,
@@ -227,10 +227,10 @@
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "Column 'Signatur' with build_extractor parameters\n",
-      "\tpattern 'AVA _ _ $$d ; AVA _ _ $$i ; AVA _ _ $$j'\n",
+      "Column 'Schlagworte' with build_extractor parameters\n",
+      "\tpattern '689 * * $$a'\n",
       "\tselector 'None'\n",
-      "\tcollector_character 'None'\n",
+      "\tcollector_character ';'\n",
       "\n"
      ]
     }
@@ -290,7 +290,8 @@
     "def uid_list_to_excel(uid_list, excel_file_name_stem):\n",
     "    data = [get_bibliographic_for_uid(uid) for uid in uid_list]\n",
     "    df = pd.DataFrame(data)\n",
-    "    df = post(df)\n",
+    "    # Do post processing only if fields 'Signatur' and 'Barcode' are available\n",
+    "    # df = post(df)\n",
     "    df.to_excel(f'Output/{excel_file_name_stem}_{now()}.xlsx', index=False)"
    ]
   },
@@ -360,10 +361,17 @@
     "def get_bibliographic_for_uid(uid):\n",
     "    try:\n",
     "        marc_xml = alma.by_mms_id(uid)\n",
-    "        parent_uid = find_parent_id_in_child_xml(marc_xml)\n",
-    "        if parent_uid:\n",
-    "            parent_xml = fetch_parent_xml(parent_uid)\n",
-    "            parent_title, parent_categories, parent_contents = inherit_from_parent(parent_xml)\n",
+    "        try:\n",
+    "            parent_uid = find_parent_id_in_child_xml(marc_xml)\n",
+    "            if parent_uid:\n",
+    "                try:\n",
+    "                    parent_xml = fetch_parent_xml(parent_uid)\n",
+    "                except:\n",
+    "                    print(f\"XML of parent {parent_uid} for child {uid} not fetchable.\", file=sys.stderr)\n",
+    "                else:\n",
+    "                    parent_title, parent_categories, parent_contents = inherit_from_parent(parent_xml)\n",
+    "        except Exception as e:\n",
+    "            print(f'No parent for child record \"{uid}\" not found: {str(e)}', file=sys.stderr)\n",
     "    except almasru.NoRecord:\n",
     "        print(f'No record for unique ID \"{uid}\" found.', file=sys.stderr)\n",
     "        d = OrderedDict()\n",
@@ -372,7 +380,7 @@
     "        d[\"Systemnummer\"] = uid\n",
     "        return d\n",
     "    except Exception as e:\n",
-    "        print(f'Exception encountered while fetching bibliographic data: {str(e)}', file=sys.stderr)\n",
+    "        print(f'Exception encountered while fetching bibliographic data for {uid}: {str(e)}', file=sys.stderr)\n",
     "    else:\n",
     "        d = OrderedDict()\n",
     "        for column, extractor in column_extractors.items():\n",
@@ -517,13 +525,15 @@
    "outputs": [],
    "source": [
     "uid_list = load_uid_list('Input/Alma_Export_en-US.xlsx')\n",
-    "file_name_stem = 'Test'"
+    "file_name_stem = 'minimal_mapping'"
    ]
   },
   {
    "cell_type": "code",
    "execution_count": 18,
-   "metadata": {},
+   "metadata": {
+    "scrolled": true
+   },
    "outputs": [],
    "source": [
     "uid_list_to_excel(uid_list, file_name_stem)"
@@ -553,7 +563,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.6.8"
+   "version": "3.6.9"
   }
  },
  "nbformat": 4,
diff --git a/Output/minimal_mapping_2019-11-19T162248.xlsx b/Output/minimal_mapping_2019-11-19T162248.xlsx
deleted file mode 100644
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diff --git a/Output/minimal_mapping_2019-12-03T135751.xlsx b/Output/minimal_mapping_2019-12-03T135751.xlsx
new file mode 100644
index 0000000000000000000000000000000000000000..f94b0c45bb7232f0ddef97f883bda027ed2096a7
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