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Misleading 'OS error: The operation completed succesfully' when hard drive fills up during asset import

Asset Import Pipeline


Misleading error dialog when hard drive fills up during asset import and creation of meta files

Steps to reproduce:

1) Make a new project in Unity, save, and close it.
2) Generate a large number of files inside the unity project that almost fills the hard drive but not quite.
3) Launch Unity and open the project so it starts importing the assets and generating meta files
4) Eventually get a dialog saying "Writing library/metadata/<some number>/<some hash> Unable to write file. OS error: The operation completed succesfully."

Reproduced: 5.6.0b4, 5.6.5f1, 2017.1.2p4, 2017.2.1p1, 2017.3.0p1, 2018.1.0b1

  1. Response avatar

    Resolution Note (2019.1.X):

    Hi there,

    We really appreciate your contribution to the Unity product. Thank you for reporting this issue. We take every case submitted to us seriously by investigating the impact on you, our customer, as well as the impact it may have on the engineering and experience of our product.

    This particular case has been investigated thoroughly and we have decided, in the interests of protecting the stability and features of Unity for users that rely upon the affected versions, to not address this fix for the time being. We understand that this will cause problems for some users, and so may address in a future version.

    Unity QA Team

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