diff --git a/capella_ros_tools/modules/capella/parser.py b/capella_ros_tools/modules/capella/parser.py
index da98504..0091d8c 100644
--- a/capella_ros_tools/modules/capella/parser.py
+++ b/capella_ros_tools/modules/capella/parser.py
@@ -49,18 +49,27 @@ def get_enums(self, package: t.Any) -> list[EnumDef]:
         """Get enums in Capella model."""
         enums = []
         for enum in package.enumerations:
+            values = []
+            for literal in enum.owned_literals:
+                try:
+                    type_name = literal.value.type.name
+                    literal_value = literal.value.value
+                except AttributeError:
+                    type_name = ""
+                    literal_value = ""
+
+                values.append(
+                    EnumValue(
+                        type_name,
+                        literal.name,
+                        literal_value,
+                        literal.description,
+                    )
+                )
             enums.append(
                 EnumDef(
                     enum.name,
-                    [
-                        EnumValue(
-                            literal.value.type.name,
-                            literal.name,
-                            literal.value.value,
-                            literal.description,
-                        )
-                        for literal in enum.owned_literals
-                    ],
+                    values,
                     enum.description,
                 )
             )
diff --git a/capella_ros_tools/scripts/capella2msg.py b/capella_ros_tools/scripts/capella2msg.py
index 1655b87..5da434e 100644
--- a/capella_ros_tools/scripts/capella2msg.py
+++ b/capella_ros_tools/scripts/capella2msg.py
@@ -91,13 +91,14 @@ def _add_package(self, current_root: t.Any) -> MessagePkgDef:
                             [
                                 ConstantDef(
                                     BaseTypeDef(
-                                        CAPELLA_TYPE_TO_MSG[value.type]
+                                        CAPELLA_TYPE_TO_MSG.get(value.type)
+                                        or "uint8"
                                     ),
                                     value.name,
-                                    str(value.value),
+                                    value.value or str(i),
                                     value.description.split("\n"),
                                 )
-                                for value in enum.values
+                                for i, value in enumerate(enum.values)
                             ],
                             [],
                         )
diff --git a/docs/source/examples/Export capella.ipynb b/docs/source/examples/Export capella.ipynb
index 8a5e4bb..7341e3f 100644
--- a/docs/source/examples/Export capella.ipynb	
+++ b/docs/source/examples/Export capella.ipynb	
@@ -9,29 +9,28 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [],
    "source": [
-    "import capellambse\n",
     "from capella_ros_tools.scripts import capella2msg\n",
     "from pathlib import Path"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
-    "msg_path = Path(\"data/coffee_msgs\")\n",
-    "capella_path = capellambse.filehandler.get_filehandler(\"git+https://github.com/DSD-DBS/coffee-machine\")\n",
+    "msg_path = Path(\"data/test\")\n",
+    "capella_path = Path(\"data/melody_model_60\")\n",
     "layer = \"la\""
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [
     {
@@ -49,7 +48,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 6,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [],
    "source": [
diff --git a/docs/source/examples/Parse capella.ipynb b/docs/source/examples/Parse capella.ipynb
new file mode 100644
index 0000000..4fc88f0
--- /dev/null
+++ b/docs/source/examples/Parse capella.ipynb	
@@ -0,0 +1,122 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Parse Capella"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "from capella_ros_tools.modules.capella.parser import CapellaModel\n",
+    "from pathlib import Path"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "Cannot load PVMT extension: ValueError: Provided model does not have a PropertyValuePkg\n",
+      "Property values are not available in this model\n"
+     ]
+    }
+   ],
+   "source": [
+    "model = CapellaModel(Path(\"data/melody_model_60\"), \"la\")"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'Wand Objects'}"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "model.get_packages(model.data)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[ClassDef(name='Wand', properties=[ClassProperty(type_name='String', type_pkg_name=None, name='owner', min_card='1', max_card='1', description=''), ClassProperty(type_name='Wand Core', type_pkg_name=None, name='core', min_card='1', max_card='1', description=''), ClassProperty(type_name='Wand Wood', type_pkg_name=None, name='wood', min_card='1', max_card='1', description='')], description=''),\n",
+       " ClassDef(name='Class 2', properties=[], description='')]"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "model.get_classes(model.data)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[EnumDef(name='Wand Core', values=[EnumValue(type='', name='Unicorn Hair', value='', description=''), EnumValue(type='', name='Dragon Heartstring', value='', description=''), EnumValue(type='', name='Pheonix Feather', value='', description=''), EnumValue(type='', name='Thestral Tail-Hair', value='', description='')], description=''),\n",
+       " EnumDef(name='Wand Wood', values=[EnumValue(type='', name='Apple', value='', description=''), EnumValue(type='', name='Cedar', value='', description=''), EnumValue(type='', name='Ebony', value='', description=''), EnumValue(type='', name='Elder', value='', description=''), EnumValue(type='', name='Holly', value='', description='')], description='')]"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "model.get_enums(model.data)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": ".capella_venv",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.12"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}
diff --git a/docs/source/examples/Parse capella.ipynb.license b/docs/source/examples/Parse capella.ipynb.license
new file mode 100644
index 0000000..f6f3181
--- /dev/null
+++ b/docs/source/examples/Parse capella.ipynb.license	
@@ -0,0 +1,2 @@
+# Copyright DB InfraGO AG and contributors
+# SPDX-License-Identifier: CC0-1.0
diff --git a/docs/source/examples/Parse messages.ipynb b/docs/source/examples/Parse messages.ipynb
index 3cbbf02..4467b61 100644
--- a/docs/source/examples/Parse messages.ipynb	
+++ b/docs/source/examples/Parse messages.ipynb	
@@ -15,7 +15,7 @@
    "source": [
     "from capella_ros_tools.modules.messages.parser import MessageDef\n",
     "from pathlib import Path\n",
-    "from IPython.display import display\n"
+    "from IPython.display import display"
    ]
   },
   {
diff --git a/pyproject.toml b/pyproject.toml
index 704b9af..e28e03b 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -41,6 +41,8 @@ Documentation = "https://dsd-dbs.github.io/capella-ros-tools"
 [project.optional-dependencies]
 docs = [
   "furo",
+  "ipython",
+  "nbsphinx",
   "sphinx",
   "sphinx-copybutton",
   "tomli; python_version<'3.11'",