diff --git a/src/pyrmv/classes/client.py b/src/pyrmv/classes/client.py
index d2b0889..51400ff 100644
--- a/src/pyrmv/classes/client.py
+++ b/src/pyrmv/classes/client.py
@@ -150,7 +150,7 @@ class Client:
             boardType=board_type.code,
         )
 
-        find_exception(board_raw)
+        find_exception(board_raw.copy())
 
         return BoardArrival(
             board_raw,
@@ -219,7 +219,7 @@ class Client:
             boardType=board_type.code,
         )
 
-        find_exception(board_raw)
+        find_exception(board_raw.copy())
 
         return BoardDeparture(
             board_raw,
@@ -343,7 +343,7 @@ class Client:
             minprio=priority_min,
         )
 
-        find_exception(messages_raw)
+        find_exception(messages_raw.copy())
 
         if "Message" in messages_raw:
             messages.extend(Message(message) for message in messages_raw["Message"])
@@ -402,7 +402,7 @@ class Client:
             toIdx=to_index,
         )
 
-        find_exception(journey_raw)
+        find_exception(journey_raw.copy())
 
         return Journey(journey_raw)
 
@@ -481,7 +481,7 @@ class Client:
             locationSelectionMode=selection_mode,  # type: ignore
         )
 
-        find_exception(stops_raw)
+        find_exception(stops_raw.copy())
 
         if "stopLocationOrCoordLocation" in stops_raw:
             for stop in stops_raw["stopLocationOrCoordLocation"]:
@@ -536,7 +536,7 @@ class Client:
             accessId=self.access_id, inputString=query, lang=lang.code, maxNo=1
         )
 
-        find_exception(stops_raw)
+        find_exception(stops_raw.copy())
 
         if len(stops_raw["stopLocationOrCoordLocation"]) <= 0:
             return None
@@ -642,7 +642,7 @@ class Client:
             filterMode=filter_mode.code,
         )
 
-        find_exception(stops_raw)
+        find_exception(stops_raw.copy())
 
         if "stopLocationOrCoordLocation" in stops_raw:
             for stop in stops_raw["stopLocationOrCoordLocation"]:
@@ -833,7 +833,7 @@ class Client:
             withFreq=frequency,
         )
 
-        find_exception(trips_raw)
+        find_exception(trips_raw.copy())
 
         if "Trip" in trips_raw:
             trips.extend(Trip(trip) for trip in trips_raw["Trip"])
@@ -913,7 +913,7 @@ class Client:
             trafficMessages=messages,
         )
 
-        find_exception(trips_raw)
+        find_exception(trips_raw.copy())
 
         if "Trip" in trips_raw:
             trips.extend(Trip(trip) for trip in trips_raw["Trip"])