diff --git a/pyrmv/classes/Client.py b/pyrmv/classes/Client.py
index a8fc61d..a625026 100644
--- a/pyrmv/classes/Client.py
+++ b/pyrmv/classes/Client.py
@@ -301,8 +301,9 @@ class Client():
 
         find_exception(messages_raw)
 
-        for message in messages_raw["Message"]:
-            messages.append(Message(message))
+        if "Message" in messages_raw:
+            for message in messages_raw["Message"]:
+                messages.append(Message(message))
 
         return messages
 
@@ -402,11 +403,12 @@ class Client():
 
         find_exception(stops_raw)
 
-        for stop in stops_raw["stopLocationOrCoordLocation"]:
-            if "StopLocation" in stop:
-                stops.append(Stop(stop["StopLocation"]))
-            elif "CoordLocation" in stop:
-                stops.append(Stop(stop["CoordLocation"]))
+        if "stopLocationOrCoordLocation" in stops_raw:
+            for stop in stops_raw["stopLocationOrCoordLocation"]:
+                if "StopLocation" in stop:
+                    stops.append(Stop(stop["StopLocation"]))
+                elif "CoordLocation" in stop:
+                    stops.append(Stop(stop["CoordLocation"]))
 
         return stops
 
@@ -504,11 +506,12 @@ class Client():
 
         find_exception(stops_raw)
 
-        for stop in stops_raw["stopLocationOrCoordLocation"]:
-            if "StopLocation" in stop:
-                stops.append(Stop(stop["StopLocation"]))
-            elif "CoordLocation" in stop:
-                stops.append(Stop(stop["CoordLocation"]))
+        if "stopLocationOrCoordLocation" in stops_raw:
+            for stop in stops_raw["stopLocationOrCoordLocation"]:
+                if "StopLocation" in stop:
+                    stops.append(Stop(stop["StopLocation"]))
+                elif "CoordLocation" in stop:
+                    stops.append(Stop(stop["CoordLocation"]))
 
         return stops
 
@@ -697,8 +700,9 @@ class Client():
 
         find_exception(trips_raw)
 
-        for trip in trips_raw["Trip"]:
-            trips.append(Trip(trip))
+        if "Trip" in trips_raw:
+            for trip in trips_raw["Trip"]:
+                trips.append(Trip(trip))
 
         return trips
 
@@ -770,7 +774,8 @@ class Client():
 
         find_exception(trips_raw)
 
-        for trip in trips_raw["Trip"]:
-            trips.append(Trip(trip))
+        if "Trip" in trips_raw:
+            for trip in trips_raw["Trip"]:
+                trips.append(Trip(trip))
 
         return trips
\ No newline at end of file