# HF Data Studio Error

**URL:** </static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhf-data-studio-error%2F190960%3E%5C
**Category:** 🤗Hub\
**Created:** [October 24, 2026, 1:55am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhf-data-studio-error%2F190960 "2026-10-24T01:55:02Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![DominicTWHV](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/dominictwhv/32/64567_2.png) [@DominicTWHV](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FDominicTWHV)%5C
**Post date:** [October 24, 2026, 1:55am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhf-data-studio-error%2F190960%2F1 "2026-10-24T01:55:02Z")

</div>

The Dataset viewer window on the readme page of the dataset works, Data Studio reports the following error on the /viewer link:

Server error while post-processing the rows. Please report the issue.

```auto
Error code: TransformRowsProcessingError
Exception: RuntimeError
Message: Previous task error: I/O error: I/O error: Permission denied (os error 13)
Traceback: Traceback (most recent call last):
                File "/src/libs/libapi/src/libapi/rows_utils.py", line 37, in _transform_row
                  transformed_row[featureName] = get_cell_value(
                                                 ~~~~~~~~~~~~~~ ^
                      dataset=dataset,
                      ^^^^^^^^^^^^^^^^
                  ...<9 lines>...
                      hf_token=hf_token,
                      ^^^^^^^^^^^^^^^^^^
                  )
                  ^
                File "/src/libs/libcommon/src/libcommon/viewer_utils/features.py", line 426, in get_cell_value
                  return image(
                      dataset=dataset,
                  ...<9 lines>...
                      json_path=json_path,
                  )
                File "/src/libs/libcommon/src/libcommon/viewer_utils/features.py", line 115, in image
                  image = PILImage.open(f)
                File "/usr/local/lib/python3.14/site-packages/PIL/Image.py", line 3650, in open
                  prefix = fp.read(16)
                File "/usr/local/lib/python3.14/site-packages/huggingface_hub/hf_file_system.py", line 1307, in read
                  return super().read(length)
                         ~~~~~~~~~~~~ ^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/fsspec/spec.py", line 1897, in read
                  out = self.cache._fetch(self.loc, self.loc + length)
                File "/usr/local/lib/python3.14/site-packages/fsspec/caching.py", line 234, in _fetch
                  self.cache = self.fetcher(start, end) # new block replaces old
                               ~~~~~~~~~~~~ ^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/huggingface_hub/hf_file_system.py", line 1253, in _fetch_range
                  return b"".join(self.fs._read_xet(self._xet_file_data, self.size, start=start, end=end))
                         ~~~~~~~~ ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                File "/usr/local/lib/python3.14/site-packages/huggingface_hub/hf_file_system.py", line 1126, in _read_xet
                  group = session.new_download_stream_group(**xet_download_group_kwargs(xet_file_data, headers))
              RuntimeError: Previous task error: I/O error: I/O error: Permission denied (os error 13)

```

Link: [https://huggingface.co/datasets/DominicTWHV/Discord-Scams/viewer](https://huggingface.co/datasets/DominicTWHV/Discord-Scams/viewer)

---

<div class="post-metadata">

**Author:** ![John6666](https://sea2.discourse-cdn.com/hellohellohello/user_avatar/discuss.huggingface.co/john6666/32/27664_2.png) [@John6666](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Fu%2FJohn6666)%5C
**Post date:** [October 24, 2026, 5:12am UTC](/static-proxy?url=https%3A%2F%2Fdiscuss.huggingface.co%2Ft%2Fhf-data-studio-error%2F190960%2F2 "2026-10-24T05:12:48Z")

</div>

Seems similar error there…? [Dataset Viewer /rows fails reading public Image through Xet; /first-rows and video-only subsets succeed · Issue #3476 · huggingface/dataset-viewer · GitHub](https://github.com/huggingface/dataset-viewer/issues/3476) @lhoestq