diff --git a/tutorial/westeros/westeros_investment.ipynb b/tutorial/westeros/westeros_investment.ipynb
index 8803403de..d8c87a8cb 100644
--- a/tutorial/westeros/westeros_investment.ipynb
+++ b/tutorial/westeros/westeros_investment.ipynb
@@ -15,9 +15,32 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 1,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "C:\\Users\\zakeri\\AppData\\Local\\Continuum\\anaconda3\\lib\\site-packages\\numpy\\_distributor_init.py:32: UserWarning: loaded more than 1 DLL from .libs:\n",
+      "C:\\Users\\zakeri\\AppData\\Local\\Continuum\\anaconda3\\lib\\site-packages\\numpy\\.libs\\libopenblas.NOIJJG62EMASZI6NYURL6JBKM4EVBGM7.gfortran-win_amd64.dll\n",
+      "C:\\Users\\zakeri\\AppData\\Local\\Continuum\\anaconda3\\lib\\site-packages\\numpy\\.libs\\libopenblas.XWYDX2IKJW2NMTWSFYNGFUWKQU3LYTCZ.gfortran-win_amd64.dll\n",
+      "  stacklevel=1)\n"
+     ]
+    },
+    {
+     "data": {
+      "application/javascript": [
+       "IPython.OutputArea.prototype._should_scroll = function(lines) { return false; }"
+      ],
+      "text/plain": [
+       "<IPython.core.display.Javascript object>"
+      ]
+     },
+     "metadata": {},
+     "output_type": "display_data"
+    }
+   ],
    "source": [
     "import pandas as pd\n",
     "import ixmp\n",
@@ -30,7 +53,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -54,7 +77,7 @@
     "    INVEST(node, year) =E= SUM(tec$( map_tec(node,tec,year) ), ( inv_cost(node,tec,year) * construction_time_factor(node,tec,year) * end_of_horizon_factor(node,tec,year) * CAP_NEW(node,tec,year) )$( inv_tec(tec) )\n",
     ");`\n",
     "\n",
-    "If you are not sure, you can check these changes here:\n",
+    "If you are not sure, you can check these changes here: https://github.com/iiasa/message_ix/pull/602\n",
     "\n",
     "At this stage, you do not need to update the model documentation as it is done in the link above. But this is a good modeling practice for documenting the new sets, parameters, variables, and equations in the GAMS files using inline Latex notes."
    ]
@@ -69,9 +92,17 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stderr",
+     "output_type": "stream",
+     "text": [
+      "This Scenario has a solution, use `Scenario.remove_solution()` or `Scenario.clone(..., keep_solution=False)`\n"
+     ]
+    }
+   ],
    "source": [
     "# Loading the baseline scenario and cloning to a new scenario\n",
     "model = \"Westeros Electrified\"\n",
@@ -81,7 +112,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -99,7 +130,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -109,7 +140,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -142,9 +173,52 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 7,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>node</th>\n",
+       "      <th>year</th>\n",
+       "      <th>lvl</th>\n",
+       "      <th>mrg</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "Empty DataFrame\n",
+       "Columns: [node, year, lvl, mrg]\n",
+       "Index: []"
+      ]
+     },
+     "execution_count": 7,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "# Reading the content variable \"INVEST\"\n",
     "scen.var(\"INVEST\")"
@@ -178,7 +252,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -196,9 +270,98 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 9,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>node</th>\n",
+       "      <th>year</th>\n",
+       "      <th>lvl</th>\n",
+       "      <th>mrg</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>World</td>\n",
+       "      <td>700</td>\n",
+       "      <td>0.000000</td>\n",
+       "      <td>7.721735</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>World</td>\n",
+       "      <td>710</td>\n",
+       "      <td>0.000000</td>\n",
+       "      <td>4.740475</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>World</td>\n",
+       "      <td>720</td>\n",
+       "      <td>0.000000</td>\n",
+       "      <td>2.910241</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>Westeros</td>\n",
+       "      <td>700</td>\n",
+       "      <td>2380.580683</td>\n",
+       "      <td>0.000000</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>Westeros</td>\n",
+       "      <td>710</td>\n",
+       "      <td>3432.070015</td>\n",
+       "      <td>0.000000</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>5</th>\n",
+       "      <td>Westeros</td>\n",
+       "      <td>720</td>\n",
+       "      <td>2195.600646</td>\n",
+       "      <td>0.000000</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "       node  year          lvl       mrg\n",
+       "0     World   700     0.000000  7.721735\n",
+       "1     World   710     0.000000  4.740475\n",
+       "2     World   720     0.000000  2.910241\n",
+       "3  Westeros   700  2380.580683  0.000000\n",
+       "4  Westeros   710  3432.070015  0.000000\n",
+       "5  Westeros   720  2195.600646  0.000000"
+      ]
+     },
+     "execution_count": 9,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "scen.var(\"INVEST\")"
    ]