diff --git a/3. O'Reilly Generate from image.ipynb b/3. O'Reilly Generate from image.ipynb
index 7d1b1da..9089244 100644
--- a/3. O'Reilly Generate from image.ipynb	
+++ b/3. O'Reilly Generate from image.ipynb	
@@ -89,7 +89,9 @@
    },
    "outputs": [],
    "source": [
-    "image_path = './image_path.jpg'"
+    "image_path = './image_path.jpg'\n",
+    "if not os.path.exists(image_path):\n",
+    "    print ('Error: image_path not found. Change image_path to image requiring captions.')"
    ]
   },
   {