diff --git a/source/Error.py b/source/Error.py
new file mode 100644
index 0000000..68c3454
--- /dev/null
+++ b/source/Error.py
@@ -0,0 +1,33 @@
+class RomAlreadyPatched(Exception):
+    def __init__(self):
+        super().__init__("ROM Already patched !")
+
+
+class InvalidGamePath(Exception):
+    def __init__(self):
+        super().__init__("This path is not valid !")
+
+
+class InvalidFormat(Exception):
+    def __init__(self):
+        super().__init__("This game format is not supported !")
+
+
+class TooMuchSha1CheckFailed(Exception):
+    def __init__(self):
+        super().__init__("Too much sha1 check failed !")
+
+
+class CantDownloadTrack(Exception):
+    def __init__(self, track, http_error: [str, int]):
+        super().__init__(f"Can't download track {track.name} ({track.sha1}) (error {http_error}) !")
+
+
+class CantConvertTrack(Exception):
+    def __init__(self):
+        super().__init__("Can't convert track.")
+
+
+class MissingTrackWU8(Exception):
+    def __init__(self):
+        super().__init__("The original wu8 track file is missing !")
diff --git a/source/Game.py b/source/Game.py
index 0a0486a..9220f14 100644
--- a/source/Game.py
+++ b/source/Game.py
@@ -7,26 +7,7 @@ import json
 from source.CT_Config import CT_Config
 from source.definition import *
 from source.wszst import *
-
-
-class RomAlreadyPatched(Exception):
-    def __init__(self):
-        super().__init__("ROM Already patched !")
-
-
-class InvalidGamePath(Exception):
-    def __init__(self):
-        super().__init__("This path is not valid !")
-
-
-class InvalidFormat(Exception):
-    def __init__(self):
-        super().__init__("This game format is not supported !")
-
-
-class TooMuchSha1CheckFailed(Exception):
-    def __init__(self):
-        super().__init__("Too much sha1 check failed !")
+from source.Error import *
 
 
 class NoGui:
diff --git a/source/Option.py b/source/Option.py
index 7d3db7b..c72ce32 100644
--- a/source/Option.py
+++ b/source/Option.py
@@ -1,7 +1,7 @@
 import json
 import os
 
-from .definition import restart
+from source.definition import restart
 
 
 class Option:
diff --git a/source/Track.py b/source/Track.py
index b5a917c..5eaed2a 100644
--- a/source/Track.py
+++ b/source/Track.py
@@ -1,20 +1,6 @@
 from source.definition import *
 from source.wszst import *
-
-
-class CantDownloadTrack(Exception):
-    def __init__(self, track, http_error: [str, int]):
-        super().__init__(f"Can't download track {track.name} ({track.sha1}) (error {http_error}) !")
-
-
-class CantConvertTrack(Exception):
-    def __init__(self):
-        super().__init__("Can't convert track.")
-
-
-class MissingTrackWU8(Exception):
-    def __init__(self):
-        super().__init__("The original wu8 track file is missing !")
+from source.Error import *
 
 
 def get_trackdata_from_json(track_json, *args, **kwargs):