diff --git a/ansto_simplon_api/routes/detector/config.py b/ansto_simplon_api/routes/detector/config.py
index 8acd7f5..b41bde5 100644
--- a/ansto_simplon_api/routes/detector/config.py
+++ b/ansto_simplon_api/routes/detector/config.py
@@ -123,16 +123,19 @@ async def get_description():
 
 @router.get("/detector_distance")
 async def get_detector_distance():
-    return {"value": zmq_start_message.detector_translation}
+    return {"value": zmq_start_message.detector_translation[2]}
 
 
 @router.put("/detector_distance")
 async def put_detector_distance(
     input: SimplonRequestFloat,
 ):
-    detector_translation = (0, 0, input.value)
-    zmq_start_message.detector_translation = detector_translation
-    return {"value": zmq_start_message.detector_translation}
+    zmq_start_message.detector_translation = [
+        zmq_start_message.detector_translation[0],
+        zmq_start_message.detector_translation[1],
+        input.value,
+    ]
+    return {"value": zmq_start_message.detector_translation[2]}
 
 
 @router.put("/detector_number")
diff --git a/ansto_simplon_api/simulate_zmq_stream.py b/ansto_simplon_api/simulate_zmq_stream.py
index abbba05..629a689 100644
--- a/ansto_simplon_api/simulate_zmq_stream.py
+++ b/ansto_simplon_api/simulate_zmq_stream.py
@@ -188,7 +188,7 @@ def create_list_of_compressed_frames(
         self.compression = compression
         self.number_of_data_files = number_of_datafiles
 
-        with h5py.File(hdf5_file_path) as hdf5_file:
+        with h5py.File(hdf5_file_path, mode="r") as hdf5_file:
             keys = list(hdf5_file["entry"]["data"].keys())
 
             if number_of_datafiles is None:
diff --git a/pyproject.toml b/pyproject.toml
index a984cb5..498da98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "ansto-simplon-api"
-version = "0.2.5"
+version = "0.2.6"
 description = "Simulated simplon api"
 authors = ["Francisco Hernandez Vivanco <hernandf@ansto.gov.au>",
            "Daniel Eriksson <daniele@ansto.gov.au>"]