diff --git a/antarest/study/storage/study_download_utils.py b/antarest/study/storage/study_download_utils.py
index bae6458e3b..d73d21350a 100644
--- a/antarest/study/storage/study_download_utils.py
+++ b/antarest/study/storage/study_download_utils.py
@@ -361,23 +361,23 @@ def write_inside_archive(path: Path, file_type: ExportFormat, matrix: MatrixAggr
 
                     f.writestr(f"{ts_data.name}.csv", bytes_to_writes)
         else:
-            with tarfile.open(path, mode="w:gz") as f:
-                for ts_data in matrix.data:
-                    bytes_to_writes = StudyDownloader.create_csv_file(ts_data, matrix)
-                    file_count += 1
-                    total_size += len(bytes_to_writes)
-                    if total_size > max_size:
-                        raise ValueError("L'archive dépasse la taille maximale autorisée.")
-                    if file_count > max_files:
-                        raise ValueError("L'archive contient trop de fichiers.")
-
-                    data_file = BytesIO(bytes_to_writes)
-                    data_file.seek(0, os.SEEK_END)
-                    file_size = data_file.tell()
-                    data_file.seek(0)
-                    info = tarfile.TarInfo(name=f"{ts_data.name}.csv")
-                    info.size = file_size
-                    f.addfile(tarinfo=info, fileobj=data_file)
+            f= tarfile.open(path, mode="w:gz")
+            for ts_data in matrix.data:
+                bytes_to_writes = StudyDownloader.create_csv_file(ts_data, matrix)
+                file_count += 1
+                total_size += len(bytes_to_writes)
+                if total_size > max_size:
+                    raise ValueError("L'archive dépasse la taille maximale autorisée.")
+                if file_count > max_files:
+                    raise ValueError("L'archive contient trop de fichiers.")
+
+                data_file = BytesIO(bytes_to_writes)
+                data_file.seek(0, os.SEEK_END)
+                file_size = data_file.tell()
+                data_file.seek(0)
+                info = tarfile.TarInfo(name=f"{ts_data.name}.csv")
+                info.size = file_size
+                f.addfile(tarinfo=info, fileobj=data_file)
 
     @staticmethod
     def create_csv_file(ts_data: TimeSeriesData, matrix: MatrixAggregationResultDTO) -> bytes: