diff --git a/doorUpdater.py b/doorUpdater.py
index b09f0c4..2f07082 100755
--- a/doorUpdater.py
+++ b/doorUpdater.py
@@ -5,6 +5,7 @@ import csv
 from io import StringIO
 import urllib3
 from hashlib import md5
+from xml.etree import ElementTree as ET
 import os
 
 from passwords import *
@@ -116,7 +117,9 @@ def doRequest(ip, params=None, files=None):
         auth=requests.auth.HTTPDigestAuth(DOOR_USERNAME, DOOR_PASSWORD),
         timeout=10,
         verify=False) # ignore insecure SSL
-    if r.status_code != 200:
+    xml = ET.XML(r.text)
+    if r.status_code != 200 \
+       or len(xml.findall("{http://www.hidglobal.com/VertX}Error")) > 0:
         print("Door Updating Error: ", r.status_code, r.reason)
         print(r.text)
         sys.exit(1)