from tempfile import mkdtemp new_folder = with_feature.get_mutable_local_copy(mkdtemp())It’s this line that causes the issue

Ah ok. I’m guessing the state file is auto uploaded in the background? I haven’t kicked that off “intentionally”

ClearML shows the new (child) dataset as “Uploading”, if that helps…

hmm… ReassuredOwl55 a lot has changed in datasets internals since then. please refer to the docs and videos to see how many exciting features were added.

FWIW I think it will turn out okay once you finish uploading the state file