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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 1 new columns ({'text'}) and 2 missing columns ({'feature1', 'feature2'}).
This happened while the csv dataset builder was generating data using
hf://datasets/121tester/test-commit-dataset-2026/data/validation.csv (at revision aafb0561507b67c7e8ebe999f0c4fe6e82ad103e), [/tmp/hf-datasets-cache/medium/datasets/51780561260375-config-parquet-and-info-121tester-test-commit-dat-e2e789e5/hub/datasets--121tester--test-commit-dataset-2026/snapshots/aafb0561507b67c7e8ebe999f0c4fe6e82ad103e/data/validation.csv (origin=hf://datasets/121tester/test-commit-dataset-2026@aafb0561507b67c7e8ebe999f0c4fe6e82ad103e/data/validation.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/python3.12/site-packages/datasets/builder.py", line 1887, in _prepare_split_single
writer.write_table(table)
File "/usr/local/lib/python3.12/site-packages/datasets/arrow_writer.py", line 675, in write_table
pa_table = table_cast(pa_table, self._schema)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 2272, in table_cast
return cast_table_to_schema(table, schema)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.12/site-packages/datasets/table.py", line 2218, in cast_table_to_schema
raise CastError(
datasets.table.CastError: Couldn't cast
id: int64
text: string
label: string
-- schema metadata --
pandas: '{"index_columns": [{"kind": "range", "name": null, "start": 0, "' + 578
to
{'id': Value('int64'), 'feature1': Value('float64'), 'feature2': Value('float64'), 'label': Value('string')}
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 1347, in compute_config_parquet_and_info_response
parquet_operations = convert_to_parquet(builder)
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/src/services/worker/src/worker/job_runners/config/parquet_and_info.py", line 980, in convert_to_parquet
builder.download_and_prepare(
File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 884, in download_and_prepare
self._download_and_prepare(
File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 947, in _download_and_prepare
self._prepare_split(split_generator, **prepare_split_kwargs)
File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1736, in _prepare_split
for job_id, done, content in self._prepare_split_single(
^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.12/site-packages/datasets/builder.py", line 1889, in _prepare_split_single
raise DatasetGenerationCastError.from_cast_error(
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 1 new columns ({'text'}) and 2 missing columns ({'feature1', 'feature2'}).
This happened while the csv dataset builder was generating data using
hf://datasets/121tester/test-commit-dataset-2026/data/validation.csv (at revision aafb0561507b67c7e8ebe999f0c4fe6e82ad103e), [/tmp/hf-datasets-cache/medium/datasets/51780561260375-config-parquet-and-info-121tester-test-commit-dat-e2e789e5/hub/datasets--121tester--test-commit-dataset-2026/snapshots/aafb0561507b67c7e8ebe999f0c4fe6e82ad103e/data/validation.csv (origin=hf://datasets/121tester/test-commit-dataset-2026@aafb0561507b67c7e8ebe999f0c4fe6e82ad103e/data/validation.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.
id
int64 | feature1
float64 | feature2
float64 | label
string |
|---|---|---|---|
1
| 0.5
| 0.3
|
A
|
2
| 0.7
| 0.2
|
B
|
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empty or missing yaml metadata in repo card
(https://huggingface.co/docs/hub/datasets-cards)
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