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The dataset generation failed because of a cast error
Error code: DatasetGenerationCastError
Exception: DatasetGenerationCastError
Message: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 2 new columns ({'audit_decision', 'audit_reason'}) and 6 missing columns ({'cause', 'started_at', 'line', 'zone', 'duration_minutes', 'ended_at'}).
This happened while the csv dataset builder was generating data using
hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272/reports/event-audit.csv (at revision 2c70a1116d0bfe5d2d13c929a1ddce627961e63a), ['hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272@2c70a1116d0bfe5d2d13c929a1ddce627961e63a/data/accepted-events.csv', 'hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272@2c70a1116d0bfe5d2d13c929a1ddce627961e63a/reports/event-audit.csv', 'hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272@2c70a1116d0bfe5d2d13c929a1ddce627961e63a/reports/outage-windows.csv']
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)
Traceback: Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1848, in _prepare_split_single
writer.write_table(table)
~~~~~~~~~~~~~~~~~~^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 784, in write_table
self._write_table(pa_table, writer_batch_size=writer_batch_size)
~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/arrow_writer.py", line 795, in _write_table
pa_table = table_cast(pa_table, self._schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2378, in table_cast
return cast_table_to_schema(table, schema)
File "/usr/local/lib/python3.14/site-packages/datasets/table.py", line 2306, in cast_table_to_schema
raise CastError(
...<3 lines>...
)
datasets.table.CastError: Couldn't cast
event_id: string
station_id: string
audit_decision: string
audit_reason: string
-- schema metadata --
pandas: '{"index_columns": [{"kind": "range", "name": null, "start": 0, "' + 766
to
{'event_id': Value('string'), 'station_id': Value('string'), 'line': Value('string'), 'zone': Value('string'), 'started_at': Value('string'), 'ended_at': Value('string'), 'cause': Value('string'), 'duration_minutes': Value('int64')}
because column names don't match
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 1369, in compute_config_parquet_and_info_response
parquet_operations, partial, estimated_dataset_info = stream_convert_to_parquet(
~~~~~~~~~~~~~~~~~~~~~~~~~^
builder, max_dataset_size_bytes=max_dataset_size_bytes
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 948, in stream_convert_to_parquet
builder._prepare_split(split_generator=splits_generators[split], file_format="parquet")
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1694, in _prepare_split
for job_id, done, content in self._prepare_split_single(
~~~~~~~~~~~~~~~~~~~~~~~~~~^
gen_kwargs=gen_kwargs, job_id=job_id, **_prepare_split_args
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/site-packages/datasets/builder.py", line 1850, in _prepare_split_single
raise DatasetGenerationCastError.from_cast_error(
...<4 lines>...
)
datasets.exceptions.DatasetGenerationCastError: An error occurred while generating the dataset
All the data files must have the same columns, but at some point there are 2 new columns ({'audit_decision', 'audit_reason'}) and 6 missing columns ({'cause', 'started_at', 'line', 'zone', 'duration_minutes', 'ended_at'}).
This happened while the csv dataset builder was generating data using
hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272/reports/event-audit.csv (at revision 2c70a1116d0bfe5d2d13c929a1ddce627961e63a), ['hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272@2c70a1116d0bfe5d2d13c929a1ddce627961e63a/data/accepted-events.csv', 'hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272@2c70a1116d0bfe5d2d13c929a1ddce627961e63a/reports/event-audit.csv', 'hf://datasets/SOTAagi2030/Metro-Service-Interruption-Ledger-272@2c70a1116d0bfe5d2d13c929a1ddce627961e63a/reports/outage-windows.csv']
Please either edit the data files to have matching columns, or separate them into different configurations (see docs at https://hf.co/docs/hub/datasets-manual-configuration#multiple-configurations)Need help to make the dataset viewer work? Make sure to review how to configure the dataset viewer, and open a discussion for direct support.
event_id string | station_id string | line string | zone string | started_at string | ended_at string | cause string | duration_minutes int64 |
|---|---|---|---|---|---|---|---|
EV-01 | ST-A | Amber | North | 2026-06-15T08:00:00Z | 2026-06-15T08:30:00Z | SIGNAL | 30 |
EV-02 | ST-A | Amber | North | 2026-06-15T08:20:00Z | 2026-06-15T09:00:00Z | SIGNAL | 40 |
EV-03 | ST-A | Amber | North | 2026-06-15T10:00:00Z | 2026-06-15T10:10:00Z | TRACK | 10 |
EV-04 | ST-B | Blue | South | 2026-06-15T07:55:00Z | 2026-06-15T08:05:00Z | TRACK | 10 |
EV-05 | ST-B | Blue | South | 2026-06-15T08:05:00Z | 2026-06-15T08:20:00Z | TRACK | 15 |
EV-01 | ST-A | null | null | null | null | null | null |
EV-02 | ST-A | null | null | null | null | null | null |
EV-03 | ST-A | null | null | null | null | null | null |
EV-04 | ST-B | null | null | null | null | null | null |
EV-05 | ST-B | null | null | null | null | null | null |
EV-06 | ST-B | null | null | null | null | null | null |
EV-07 | ST-C | null | null | null | null | null | null |
EV-08 | ST-D | null | null | null | null | null | null |
EV-09 | ST-X | null | null | null | null | null | null |
EV-10 | ST-A | null | null | null | null | null | null |
EV-11 | ST-A | null | null | null | null | null | null |
EV-12 | ST-A | null | null | null | null | null | null |
null | ST-A | Amber | North | 2026-06-15T08:00:00Z | 2026-06-15T09:00:00Z | null | 60 |
null | ST-A | Amber | North | 2026-06-15T10:00:00Z | 2026-06-15T10:10:00Z | null | 10 |
null | ST-B | Blue | South | 2026-06-15T07:55:00Z | 2026-06-15T08:20:00Z | null | 25 |
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Metro service interruption ledger
Release: Metro Service Interruption Ledger — June 2026
This cutoff ledger covers 4 catalog stations. 3 are operational, and 2 are both operational and on included lines.
The source contains 12 physical disruption events: 5 accepted and 7 rejected. Accepted events form 3 merged outage windows across 2 stations.
The total merged interruption duration is 95 minutes. The reporting cutoff is 2026-06-15T12:00:00Z.
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