diff --git a/app.py b/app.py
index c37eef2..bd3705d 100755
--- a/app.py
+++ b/app.py
@@ -10,7 +10,6 @@ import json
 app = Flask(__name__)
 Bootstrap(app)
 app.config["BOOTSTRAP_SERVE_LOCAL"] = True
-app.debug = False
 nav = Nav()
 nav.init_app(app)
 nav.register_element("frontend_top", Navbar(View("Tasmota SML Decoder", ".index")))
@@ -27,6 +26,7 @@ def decode():
         return redirect("/")
     elif request.method == "POST":
         data = request.form["smldump"].splitlines()
+        data = [x.strip() for x in data]
 
         tas = TasmotaSMLParser()
         msgs = tas.decode_messages(data)
@@ -43,9 +43,10 @@ def decode():
             "decode.html",
             smldump=data,
             parse_errors=tas.parse_errors,
+            obis_errors=tas.obis_errors,
             messages=messages,
         )
 
 
 if __name__ == "__main__":
-    app.run()
+    app.run(debug=True)
diff --git a/sml_decoder.py b/sml_decoder.py
index 9a4e66e..8b80123 100755
--- a/sml_decoder.py
+++ b/sml_decoder.py
@@ -1,8 +1,9 @@
 #!/usr/bin/env python3
 
-from binascii import a2b_hex
+from binascii import a2b_hex, b2a_hex
 from smllib.sml_frame import SmlFrame
 from smllib.const import OBIS_NAMES, UNITS
+from pprint import pprint
 
 file = "test-data.txt"
 
@@ -15,10 +16,10 @@ class TasmotaSMLParser:
 
     def parse_input(self, input):
         """Parse a line into a frame"""
-        if " : 77 " in input:
+        if " : 77 " in input.strip():
             # Remove the spaces and return a bytestring
             frame = a2b_hex("".join((input.split(" : ", 1)[1]).split()))
-        elif input.startswith("77 0"):
+        elif input.startswith("77 "):
             frame = a2b_hex("".join(input.split()))
         else:
             self.parse_errors.append(input)
@@ -32,8 +33,10 @@ class TasmotaSMLParser:
             msgs = f.get_obis()
             if len(msgs) == 0:
                 return False
-        except:
-            self.obis_errors.append(frame)
+        except Exception as e:
+            self.obis_errors.append(
+                {"frame": frame, "hex": b2a_hex(frame, b" "), "msg": e.args[0]}
+            )
             return None
         return msgs
 
@@ -68,7 +71,9 @@ class TasmotaSMLParser:
             precision = 0
 
         try:
-            human_readable = f"{round(msg.value * pow(10, msg.scaler), precision)}{unit} ({name})"
+            human_readable = (
+                f"{round(msg.value * pow(10, msg.scaler), precision)}{unit} ({name})"
+            )
         except TypeError:
             if msg.unit in UNITS and msg.name in OBIS_NAMES:
                 human_readable = f"{msg.value}{unit} ({name})"
@@ -117,6 +122,9 @@ def main():
             print(tas.build_meter_def(msg))
             print(80 * "#")
 
+    if len(tas.obis_errors) > 0:
+        pprint(tas.obis_errors)
+
 
 if __name__ == "__main__":
     main()
diff --git a/templates/decode.html b/templates/decode.html
index bf02418..be54b86 100644
--- a/templates/decode.html
+++ b/templates/decode.html
@@ -27,7 +27,7 @@
       <p><p>
     </div>
     <div>
-{% if messages | length > 0 %}
+{% if messages | length > 0 %}
       <h2>Dekodierte SML Nachrichten</h2>
       <table class="table table-striped">
         <thead class="thead-light">
@@ -47,7 +47,7 @@
             <td>{{ msg.msg.obis_short }}</td>
             <td>{{ msg.msg.name }}</td>
             <td>{{ msg.msg.value}}</td>
-            <td>{{ msg.msg.unit }}</td>
+            <td>{{ msg.msg.unit }}</td>
             <td>{{ msg.msg.human_readable }}</td>
           </tr>
 {%- endfor %}
@@ -62,13 +62,19 @@
 {% endfor -%}</pre>
 {% endif %}
       <hr>
+{% if obis_errors | length > 0 %}
+      <h2>Parsing Fehler</h2>
+      <pre>{% for error in obis_errors -%}
+        <span class="parser-error">{{ error.hex.decode('utf-8') }}</span>: {{ error.msg }}
+{% endfor -%}</pre>
+{% endif %}
       <h2>Empfangene Daten</h2>
       Folgende Daten wurden empfangen.
       <pre>{% for line in smldump -%}
 {% if line in parse_errors -%}
-        <span class="parser-error">{{ line }}</span>
+        <span class="parser-error">{{ line | e }}</span>
 {% else -%}
-        <span class="parser-success">{{ line }}</span>
+        <span class="parser-success">{{ line | e }}</span>
 {% endif -%}
 {% endfor -%}</pre>
     </div>