DMSC Integration Testing

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084473.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:267: in load_nexus_data
nexus.load_data(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084473.hdf')
selection = slice(None, None, None)

def load_data(
file_path: FilePath | NeXusFile | NeXusGroup,
selection: snx.typing.ScippIndex | slice = (),
*,
entry_name: NeXusEntryName | None = None,
component_name: str,
definitions: Mapping | NoNewDefinitionsType = NoNewDefinitions,
) -> sc.DataArray:
"""Load data of a detector or monitor from a NeXus file.

Loads either event data from an ``NXevent_data`` group or histogram
data from an ``NXdata`` group depending on which ``group`` contains.
Event data is grouped by ``'event_time_zero'`` as in the NeXus file.
Histogram data is returned as encoded in the file.

Parameters
----------
file_path:
Indicates where to load data from.
One of:

- Path to a NeXus file on disk.
- File handle or buffer for reading binary data.
- A ScippNexus group of the root of a NeXus file.
selection:
Select which aprt of the data to load.
By default, load all data.
Supports anything that ScippNexus supports.
component_name:
Name of the NXdetector or NXmonitor containing the NXevent_data to load.
Must be a group in an instrument group in the entry (see below).
entry_name:
Name of the entry that contains the detector.
If ``None``, the entry will be located based
on its NeXus class, but there cannot be more than 1.
definitions:
Definitions used by scippnexus loader, see :py:`scippnexus.File`
for documentation.

Returns
-------
:
Data array with events or a histogram.
"""
with open_nexus_file(file_path, definitions=definitions) as f:
entry = _unique_child_group(f, snx.NXentry, entry_name)
instrument = _unique_child_group(entry, snx.NXinstrument, None)
component = instrument[component_name]
if _contains_nx_class(component, snx.NXevent_data):
data = _unique_child_group(component, snx.NXevent_data, None)
sel = _to_snx_selection(selection, for_events=True)
elif _contains_nx_class(component, snx.NXdata):
data = _unique_child_group(component, snx.NXdata, None)
sel = _to_snx_selection(selection, for_events=False)
else:
> raise ValueError(
f"NeXus group '{component.name}' contains neither "
"NXevent_data nor NXdata."
)
E ValueError: NeXus group '/entry/instrument/orca_detector' contains neither NXevent_data nor NXdata.

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:371: ValueError

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084396.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:267: in load_nexus_data
nexus.load_data(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084396.hdf')
selection = slice(None, None, None)

def load_data(
file_path: FilePath | NeXusFile | NeXusGroup,
selection: snx.typing.ScippIndex | slice = (),
*,
entry_name: NeXusEntryName | None = None,
component_name: str,
definitions: Mapping | NoNewDefinitionsType = NoNewDefinitions,
) -> sc.DataArray:
"""Load data of a detector or monitor from a NeXus file.

Loads either event data from an ``NXevent_data`` group or histogram
data from an ``NXdata`` group depending on which ``group`` contains.
Event data is grouped by ``'event_time_zero'`` as in the NeXus file.
Histogram data is returned as encoded in the file.

Parameters
----------
file_path:
Indicates where to load data from.
One of:

- Path to a NeXus file on disk.
- File handle or buffer for reading binary data.
- A ScippNexus group of the root of a NeXus file.
selection:
Select which aprt of the data to load.
By default, load all data.
Supports anything that ScippNexus supports.
component_name:
Name of the NXdetector or NXmonitor containing the NXevent_data to load.
Must be a group in an instrument group in the entry (see below).
entry_name:
Name of the entry that contains the detector.
If ``None``, the entry will be located based
on its NeXus class, but there cannot be more than 1.
definitions:
Definitions used by scippnexus loader, see :py:`scippnexus.File`
for documentation.

Returns
-------
:
Data array with events or a histogram.
"""
with open_nexus_file(file_path, definitions=definitions) as f:
entry = _unique_child_group(f, snx.NXentry, entry_name)
instrument = _unique_child_group(entry, snx.NXinstrument, None)
component = instrument[component_name]
if _contains_nx_class(component, snx.NXevent_data):
data = _unique_child_group(component, snx.NXevent_data, None)
sel = _to_snx_selection(selection, for_events=True)
elif _contains_nx_class(component, snx.NXdata):
data = _unique_child_group(component, snx.NXdata, None)
sel = _to_snx_selection(selection, for_events=False)
else:
> raise ValueError(
f"NeXus group '{component.name}' contains neither "
"NXevent_data nor NXdata."
)
E ValueError: NeXus group '/entry/instrument/orca_detector' contains neither NXevent_data nor NXdata.

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:371: ValueError

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084263.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:267: in load_nexus_data
nexus.load_data(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084263.hdf')
selection = slice(None, None, None)

def load_data(
file_path: FilePath | NeXusFile | NeXusGroup,
selection: snx.typing.ScippIndex | slice = (),
*,
entry_name: NeXusEntryName | None = None,
component_name: str,
definitions: Mapping | NoNewDefinitionsType = NoNewDefinitions,
) -> sc.DataArray:
"""Load data of a detector or monitor from a NeXus file.

Loads either event data from an ``NXevent_data`` group or histogram
data from an ``NXdata`` group depending on which ``group`` contains.
Event data is grouped by ``'event_time_zero'`` as in the NeXus file.
Histogram data is returned as encoded in the file.

Parameters
----------
file_path:
Indicates where to load data from.
One of:

- Path to a NeXus file on disk.
- File handle or buffer for reading binary data.
- A ScippNexus group of the root of a NeXus file.
selection:
Select which aprt of the data to load.
By default, load all data.
Supports anything that ScippNexus supports.
component_name:
Name of the NXdetector or NXmonitor containing the NXevent_data to load.
Must be a group in an instrument group in the entry (see below).
entry_name:
Name of the entry that contains the detector.
If ``None``, the entry will be located based
on its NeXus class, but there cannot be more than 1.
definitions:
Definitions used by scippnexus loader, see :py:`scippnexus.File`
for documentation.

Returns
-------
:
Data array with events or a histogram.
"""
with open_nexus_file(file_path, definitions=definitions) as f:
entry = _unique_child_group(f, snx.NXentry, entry_name)
instrument = _unique_child_group(entry, snx.NXinstrument, None)
component = instrument[component_name]
if _contains_nx_class(component, snx.NXevent_data):
data = _unique_child_group(component, snx.NXevent_data, None)
sel = _to_snx_selection(selection, for_events=True)
elif _contains_nx_class(component, snx.NXdata):
data = _unique_child_group(component, snx.NXdata, None)
sel = _to_snx_selection(selection, for_events=False)
else:
> raise ValueError(
f"NeXus group '{component.name}' contains neither "
"NXevent_data nor NXdata."
)
E ValueError: NeXus group '/entry/instrument/orca_detector' contains neither NXevent_data nor NXdata.

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:371: ValueError

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084123.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:267: in load_nexus_data
nexus.load_data(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084123.hdf')
selection = slice(None, None, None)

def load_data(
file_path: FilePath | NeXusFile | NeXusGroup,
selection: snx.typing.ScippIndex | slice = (),
*,
entry_name: NeXusEntryName | None = None,
component_name: str,
definitions: Mapping | NoNewDefinitionsType = NoNewDefinitions,
) -> sc.DataArray:
"""Load data of a detector or monitor from a NeXus file.

Loads either event data from an ``NXevent_data`` group or histogram
data from an ``NXdata`` group depending on which ``group`` contains.
Event data is grouped by ``'event_time_zero'`` as in the NeXus file.
Histogram data is returned as encoded in the file.

Parameters
----------
file_path:
Indicates where to load data from.
One of:

- Path to a NeXus file on disk.
- File handle or buffer for reading binary data.
- A ScippNexus group of the root of a NeXus file.
selection:
Select which aprt of the data to load.
By default, load all data.
Supports anything that ScippNexus supports.
component_name:
Name of the NXdetector or NXmonitor containing the NXevent_data to load.
Must be a group in an instrument group in the entry (see below).
entry_name:
Name of the entry that contains the detector.
If ``None``, the entry will be located based
on its NeXus class, but there cannot be more than 1.
definitions:
Definitions used by scippnexus loader, see :py:`scippnexus.File`
for documentation.

Returns
-------
:
Data array with events or a histogram.
"""
with open_nexus_file(file_path, definitions=definitions) as f:
entry = _unique_child_group(f, snx.NXentry, entry_name)
instrument = _unique_child_group(entry, snx.NXinstrument, None)
component = instrument[component_name]
if _contains_nx_class(component, snx.NXevent_data):
data = _unique_child_group(component, snx.NXevent_data, None)
sel = _to_snx_selection(selection, for_events=True)
elif _contains_nx_class(component, snx.NXdata):
data = _unique_child_group(component, snx.NXdata, None)
sel = _to_snx_selection(selection, for_events=False)
else:
> raise ValueError(
f"NeXus group '{component.name}' contains neither "
"NXevent_data nor NXdata."
)
E ValueError: NeXus group '/entry/instrument/orca_detector' contains neither NXevent_data nor NXdata.

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:371: ValueError

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084050.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:267: in load_nexus_data
nexus.load_data(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084050.hdf')
selection = slice(None, None, None)

def load_data(
file_path: FilePath | NeXusFile | NeXusGroup,
selection: snx.typing.ScippIndex | slice = (),
*,
entry_name: NeXusEntryName | None = None,
component_name: str,
definitions: Mapping | NoNewDefinitionsType = NoNewDefinitions,
) -> sc.DataArray:
"""Load data of a detector or monitor from a NeXus file.

Loads either event data from an ``NXevent_data`` group or histogram
data from an ``NXdata`` group depending on which ``group`` contains.
Event data is grouped by ``'event_time_zero'`` as in the NeXus file.
Histogram data is returned as encoded in the file.

Parameters
----------
file_path:
Indicates where to load data from.
One of:

- Path to a NeXus file on disk.
- File handle or buffer for reading binary data.
- A ScippNexus group of the root of a NeXus file.
selection:
Select which aprt of the data to load.
By default, load all data.
Supports anything that ScippNexus supports.
component_name:
Name of the NXdetector or NXmonitor containing the NXevent_data to load.
Must be a group in an instrument group in the entry (see below).
entry_name:
Name of the entry that contains the detector.
If ``None``, the entry will be located based
on its NeXus class, but there cannot be more than 1.
definitions:
Definitions used by scippnexus loader, see :py:`scippnexus.File`
for documentation.

Returns
-------
:
Data array with events or a histogram.
"""
with open_nexus_file(file_path, definitions=definitions) as f:
entry = _unique_child_group(f, snx.NXentry, entry_name)
instrument = _unique_child_group(entry, snx.NXinstrument, None)
component = instrument[component_name]
if _contains_nx_class(component, snx.NXevent_data):
data = _unique_child_group(component, snx.NXevent_data, None)
sel = _to_snx_selection(selection, for_events=True)
elif _contains_nx_class(component, snx.NXdata):
data = _unique_child_group(component, snx.NXdata, None)
sel = _to_snx_selection(selection, for_events=False)
else:
> raise ValueError(
f"NeXus group '{component.name}' contains neither "
"NXevent_data nor NXdata."
)
E ValueError: NeXus group '/entry/instrument/orca_detector' contains neither NXevent_data nor NXdata.

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:371: ValueError

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084043.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:267: in load_nexus_data
nexus.load_data(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00084043.hdf')
selection = slice(None, None, None)

def load_data(
file_path: FilePath | NeXusFile | NeXusGroup,
selection: snx.typing.ScippIndex | slice = (),
*,
entry_name: NeXusEntryName | None = None,
component_name: str,
definitions: Mapping | NoNewDefinitionsType = NoNewDefinitions,
) -> sc.DataArray:
"""Load data of a detector or monitor from a NeXus file.

Loads either event data from an ``NXevent_data`` group or histogram
data from an ``NXdata`` group depending on which ``group`` contains.
Event data is grouped by ``'event_time_zero'`` as in the NeXus file.
Histogram data is returned as encoded in the file.

Parameters
----------
file_path:
Indicates where to load data from.
One of:

- Path to a NeXus file on disk.
- File handle or buffer for reading binary data.
- A ScippNexus group of the root of a NeXus file.
selection:
Select which aprt of the data to load.
By default, load all data.
Supports anything that ScippNexus supports.
component_name:
Name of the NXdetector or NXmonitor containing the NXevent_data to load.
Must be a group in an instrument group in the entry (see below).
entry_name:
Name of the entry that contains the detector.
If ``None``, the entry will be located based
on its NeXus class, but there cannot be more than 1.
definitions:
Definitions used by scippnexus loader, see :py:`scippnexus.File`
for documentation.

Returns
-------
:
Data array with events or a histogram.
"""
with open_nexus_file(file_path, definitions=definitions) as f:
entry = _unique_child_group(f, snx.NXentry, entry_name)
instrument = _unique_child_group(entry, snx.NXinstrument, None)
component = instrument[component_name]
if _contains_nx_class(component, snx.NXevent_data):
data = _unique_child_group(component, snx.NXevent_data, None)
sel = _to_snx_selection(selection, for_events=True)
elif _contains_nx_class(component, snx.NXdata):
data = _unique_child_group(component, snx.NXdata, None)
sel = _to_snx_selection(selection, for_events=False)
else:
> raise ValueError(
f"NeXus group '{component.name}' contains neither "
"NXevent_data nor NXdata."
)
E ValueError: NeXus group '/entry/instrument/orca_detector' contains neither NXevent_data nor NXdata.

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:371: ValueError

workflow =
coda_nexus_file_path = PosixPath('/ess/data/coda/2025/999999/raw/999999_00083952.hdf')
check_everything_histogram =

def test_tbl_read_detector_everything__orca_detector(
workflow: sciline.Pipeline,
coda_nexus_file_path: Path,
check_everything_histogram: Callable,
) -> None:
workflow[Filename[SampleRun]] = coda_nexus_file_path
workflow[NeXusDetectorName] = "orca_detector"

# Read the event data
> result = workflow.compute(DetectorData[SampleRun])
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

tests/nexusfiles-scipp/tbl/tbl_load_nexus_test.py:139:
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/pipeline.py:191: in compute
return self.get(tp, **kwargs).compute(reporter=reporter)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/task_graph.py:122: in compute
return self._scheduler.get(self._graph, [targets], reporter=reporter)[0]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/sciline/scheduler.py:119: in get
return self._dask_get(dsk, list(map(_to_dask_key, keys)))
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/threaded.py:91: in get
results = get_async(
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:549: in get_async
raise_exception(exc, tb)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:353: in reraise
raise exc
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/local.py:258: in execute_task
result = task(data)
^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/_task_spec.py:759: in __call__
return self.func(*new_argspec)
^^^^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/dask/utils.py:80: in apply
return func(*args)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:230: in load_nexus_component
nexus.load_component(location, nx_class=nx_class, definitions=definitions)
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/_nexus_loader.py:58: in load_component
loaded = cast(sc.DataGroup, component[selection])
^^^^^^^^^^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/scippnexus/base.py:378: in __getitem__
dg = self._nexus.read_children(sel)
^^^^^^^^^^^
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/scippnexus/base.py:265: in _nexus
self._populate_fields()
.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/scippnexus/base.py:280: in _populate_fields
self._lazy_nexus = self._definitions.get(self.attrs.get('NX_class'), NXobject)(
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

self =
attrs = mappingproxy()
children = {'data': , 'depends_on': , 'image_key': , 'intensifier': , ...}

def __init__(
self, attrs: dict[str, Any], children: dict[str, snx.Field | snx.Group]
):
children = _drop(children, (snx.NXoff_geometry, snx.NXevent_data))
> children['data'] = children['detector_number']
^^^^^^^^^^^^^^^^^^^^^^^^^^^
E KeyError: 'detector_number'

.tox/nexusfiles-scipp-tbl/lib/python3.12/site-packages/ess/reduce/nexus/workflow.py:556: KeyError