# epochs uploading Error

**URL:** <https://mne.discourse.group/t/epochs-uploading-error/5786>\
**Category:** Support & Discussions\
**Tags:** eeg, epochs\
**Created:** [October 22, 2022, 1:11pm UTC](https://mne.discourse.group/t/epochs-uploading-error/5786 "2022-10-22T13:11:22Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![MNE](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@MNE](https://mne.discourse.group/u/MNE)\
**Post date:** [October 22, 2022, 1:11pm UTC](https://mne.discourse.group/t/epochs-uploading-error/5786/1 "2022-10-22T13:11:22Z")

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Hi, When I try to upload epochs files this error appears for me:

RuntimeWarning: This filename (/Users//Desktop/EEG feature extraction /epochs/clean\_sub2\_erp\_epochs.fif) does not conform to MNE naming conventions. All epochs files should end with -epo.fif, -epo.fif.gz, \_epo.fif or \_epo.fif.gz

Could anyone help me with what this means?  
Thank you

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**Author:** ![mscheltienne](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/mscheltienne/32/827_2.png) [@mscheltienne](https://mne.discourse.group/u/mscheltienne)\
**Post date:** [October 22, 2022, 2:08pm UTC](https://mne.discourse.group/t/epochs-uploading-error/5786/2 "2022-10-22T14:08:23Z")

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Hello,

This is not an error but a warning. The file you created will still be created regardless of the fact that it does not conform to the naming convention expected.  
The point is that the FIFF format (with the `.fif` extension) can store many different types of data: Raw, Epochs, Forward models, ICA decomposition, … Thus, a naming convention exists to differentiate between the different data types.

A file containing epoch data is expected to end with `-epo.fif`, `-epo.fif.gz`, `_epo.fif` or `_epo.fif.gz` as mentioned by the error message.  
Your file ends with `_epochs.fif` which does not respect this convention, thus the warning.

Mathieu

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<div class="post-metadata">

**Author:** ![MNE](https://avatars.discourse-cdn.com/v4/letter/m/8edcca/32.png) [@MNE](https://mne.discourse.group/u/MNE)\
**Post date:** [October 22, 2022, 3:49pm UTC](https://mne.discourse.group/t/epochs-uploading-error/5786/3 "2022-10-22T15:49:08Z")

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Thank you so much I got it now.