# Overflow error when trying to read GDF

**URL:** https://mne.discourse.group/t/overflow-error-when-trying-to-read-gdf/10432
**Category:** Support & Discussions
**Tags:** preprocessing, eeg
**Created:** [October 21, 2024, 2:30pm UTC](https://mne.discourse.group/t/overflow-error-when-trying-to-read-gdf/10432 "2024-10-21T14:30:17Z")
**Posts on this page:** 1
**Showing post:** 2

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### Author: ![cbrnr](https://yyz2.discourse-cdn.com/free1/user_avatar/mne.discourse.group/cbrnr/32/1409_2.png) [@cbrnr](https://mne.discourse.group/u/cbrnr)
#### Post date: [October 21, 2024, 2:35pm UTC](https://mne.discourse.group/t/overflow-error-when-trying-to-read-gdf/10432/2 "2024-10-21T14:35:04Z")

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I think this issue has already been reported here:

> [@Error loading GDF file with MNE: Python integer 256 out of bounds for uint8](https://mne.discourse.group/t/error-loading-gdf-file-with-mne-python-integer-256-out-of-bounds-for-uint8/10410):
>
> Need Help Reading EEG Data in.GDF Format Hello everyone, I’ve been working on a project involving EEG data analysis for the past couple of days, but I’m encountering a persistent issue. I’m trying to read my signal data from a . GDF file, but I’m running into an error that I can’t seem to resolve. Details: File Format: .GDF Error Message: [Error loading GDF file with MNE: Python integer 256 out of bounds for uint8] I would greatly appreciate any guida…

@Groenborg14 can you please post the output of `mne.sys_info()`?

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