# Support & Discussions **URL:** https://mne.discourse.group/c/support-discussions/6.md?page=1 [Latest](https://mne.discourse.group/latest.md) · [Categories](https://mne.discourse.group/categories.md) · [Tags](https://mne.discourse.group/tags.md) **Page:** 2 --- ## [trigger duration mismatch](https://mne.discourse.group/t/trigger-duration-mismatch/11877)
**Author:** [@aidalynn](https://mne.discourse.group/u/aidalynn)\ **Replies:** 1\ **Last updated:** [July 3, 2026, 7:26pm UTC](https://mne.discourse.group/t/trigger-duration-mismatch/11877 "2026-07-03T19:26:28Z")
I’m using mne version 1.1.dev0. I’m trying to get the events from my opm-meg experiment, and one of my triggers is only found when i set min\_duration=1e-4, which is way too short. However, I set the trigger duration to… --- ## [Advice on preprocessing dual EEG (129 channels)/eye-tracking](https://mne.discourse.group/t/advice-on-preprocessing-dual-eeg-129-channels-eye-tracking/11873)
**Author:** [@Jibok](https://mne.discourse.group/u/Jibok)\ **Replies:** 6\ **Last updated:** [June 30, 2026, 4:25am UTC](https://mne.discourse.group/t/advice-on-preprocessing-dual-eeg-129-channels-eye-tracking/11873 "2026-06-30T04:25:15Z")
Hello! I am fairly new to MNE and wanted to ask for advice on the best course of action for a project broadly looking into how different ERPs are elicited in response to fixations to different video ROIs (eyes, mouth, e… --- ## [Error running pytest](https://mne.discourse.group/t/error-running-pytest/11874)
**Author:** [@martin](https://mne.discourse.group/u/martin)\ **Replies:** 2\ **Last updated:** [June 23, 2026, 4:25pm UTC](https://mne.discourse.group/t/error-running-pytest/11874 "2026-06-23T16:25:18Z")
When running pytest I am greeted by this error: (mnedev) ✘-TSTP /mnt/d/git/obergmartin/mne-python \[main|⚑ 1\] 11:33 $ pytest mne/tests/test\_evoked.py -k test\_io\_evoked --verbose ERROR: usage: pytest \[options\] \[file\_or\_d… --- ## [Recommended preprocessing pipeline for 32-channel eyes-closed resting EEG before PSD analysis](https://mne.discourse.group/t/recommended-preprocessing-pipeline-for-32-channel-eyes-closed-resting-eeg-before-psd-analysis/11866)
**Author:** [@Vicky\_Kachera](https://mne.discourse.group/u/Vicky_Kachera)\ **Replies:** 11\ **Last updated:** [June 22, 2026, 8:58am UTC](https://mne.discourse.group/t/recommended-preprocessing-pipeline-for-32-channel-eyes-closed-resting-eeg-before-psd-analysis/11866 "2026-06-22T08:58:53Z")
Greetings!, I am working with EEG data recorded from 32 channels (Brain Products) during eyes-closed, guided-meditation (Yoga Nidra) in a supine condition. The dataset includes 12 subjects. For each recording, the begin… --- ## [Evaluating LCMV Beamformer Source Model Fitting](https://mne.discourse.group/t/evaluating-lcmv-beamformer-source-model-fitting/11843)
**Author:** [@tzcheng911](https://mne.discourse.group/u/tzcheng911)\ **Replies:** 5\ **Last updated:** [June 18, 2026, 1:37pm UTC](https://mne.discourse.group/t/evaluating-lcmv-beamformer-source-model-fitting/11843 "2026-06-18T13:37:24Z")
Dear beamformer experts, I am working on localizing the frequency-following response (FFR) from subcortical sources using an LCMV beamformer. The source localization results are unexpected. They do not localize to the b… --- ## [Interpolating channels marked as 'bad' in the MNE-BIDS-Pipeline](https://mne.discourse.group/t/interpolating-channels-marked-as-bad-in-the-mne-bids-pipeline/11860)
**Author:** [@lightwind](https://mne.discourse.group/u/lightwind)\ **Replies:** 4\ **Last updated:** [June 14, 2026, 11:26am UTC](https://mne.discourse.group/t/interpolating-channels-marked-as-bad-in-the-mne-bids-pipeline/11860 "2026-06-14T11:26:23Z")
Dear community, When preparing my EEG data for analysis with the MNE-BIDS-Pipeline, I mark very noisy or flat channels as ‘bad’, following the recommendations I found on the documentation. However, the pipeline appears … --- ## [LCMV Beamformer Regularization Parameter Does Not Affect Results](https://mne.discourse.group/t/lcmv-beamformer-regularization-parameter-does-not-affect-results/11842)
**Author:** [@tzcheng911](https://mne.discourse.group/u/tzcheng911)\ **Replies:** 2\ **Last updated:** [June 12, 2026, 4:39am UTC](https://mne.discourse.group/t/lcmv-beamformer-regularization-parameter-does-not-affect-results/11842 "2026-06-12T04:39:54Z")
MNE version: 1.11.0 operating system: Ubuntu 18.04 Dear beamformer experts, I am experimenting with parameters in mne.beamformer.make\_lcmv. Some parameter changes affect the source results as expected. However, I am c… --- ## [System deadlock when saving TFR object after computing TFR from epochs](https://mne.discourse.group/t/system-deadlock-when-saving-tfr-object-after-computing-tfr-from-epochs/11852)
**Author:** [@juliemichelle](https://mne.discourse.group/u/juliemichelle)\ **Replies:** 10\ **Last updated:** [June 11, 2026, 10:02am UTC](https://mne.discourse.group/t/system-deadlock-when-saving-tfr-object-after-computing-tfr-from-epochs/11852 "2026-06-11T10:02:55Z")
Hi, I am trying to calculate TFR objects per subject x session from my group epochs object. My system seems to get in some sort of deadlock at the power.save() stage of the first subject x session (i.e. the first iterat… --- ## [Channel interpolation and frequency filtering in MNE-BIDS-Pipeline](https://mne.discourse.group/t/channel-interpolation-and-frequency-filtering-in-mne-bids-pipeline/6583)
**Author:** [@fraenni](https://mne.discourse.group/u/fraenni)\ **Replies:** 3\ **Last updated:** [June 10, 2026, 2:32pm UTC](https://mne.discourse.group/t/channel-interpolation-and-frequency-filtering-in-mne-bids-pipeline/6583 "2026-06-10T14:32:48Z")
Hello, thanks for the new features in the pipeline. I am using the pipeline for ONLY eeg-data I have two general questions: Is it possible to define bad EEG channels and interpolate them in a later state? Is it poss… --- ## [Mismatch between MEG sensor-space and source-space cluster visualization](https://mne.discourse.group/t/mismatch-between-meg-sensor-space-and-source-space-cluster-visualization/11846)
**Author:** [@YuKuAl2300](https://mne.discourse.group/u/YuKuAl2300)\ **Replies:** 1\ **Last updated:** [June 5, 2026, 9:03am UTC](https://mne.discourse.group/t/mismatch-between-meg-sensor-space-and-source-space-cluster-visualization/11846 "2026-06-05T09:03:33Z")
Hello everyone, I am analyzing MEG time-frequency data and I am trying to understand a mismatch between sensor-space and source-space group statistics. In sensor space, I observe positive significant clusters ove… --- ## [Which way is up after using mne.preprocessing.eyetracking.convert\_units to convert screen coordinates?](https://mne.discourse.group/t/which-way-is-up-after-using-mne-preprocessing-eyetracking-convert-units-to-convert-screen-coordinates/11844)
**Author:** [@Cathaway](https://mne.discourse.group/u/Cathaway)\ **Replies:** 1\ **Last updated:** [May 28, 2026, 3:14pm UTC](https://mne.discourse.group/t/which-way-is-up-after-using-mne-preprocessing-eyetracking-convert-units-to-convert-screen-coordinates/11844 "2026-05-28T15:14:30Z")
We know that EyeLink trackers defaults to setting (0, 0) as the top left corner of screen, with positive Y values referring to areas below it and MNE defaults to using screen centre as (0, 0), but what about the Y-axis … --- ## [mne.Report.add\_trans(): Cannot connect to a valid display](https://mne.discourse.group/t/mne-report-add-trans-cannot-connect-to-a-valid-display/11829)
**Author:** [@LeonardoMelloni](https://mne.discourse.group/u/LeonardoMelloni)\ **Replies:** 2\ **Last updated:** [May 28, 2026, 1:19pm UTC](https://mne.discourse.group/t/mne-report-add-trans-cannot-connect-to-a-valid-display/11829 "2026-05-28T13:19:21Z")
Hi guys, in my pipeline I’m generating an mne.Report, in particular using the methods .add\_trans(), .add\_forward(), .add\_inverse\_operator() and .add\_stc(). This is the error I get when calling for example .add\_trans() … --- ## [How to install only CORE functionality of MNE?](https://mne.discourse.group/t/how-to-install-only-core-functionality-of-mne/11840)
**Author:** [@warptengood](https://mne.discourse.group/u/warptengood)\ **Replies:** 1\ **Last updated:** [May 23, 2026, 4:31pm UTC](https://mne.discourse.group/t/how-to-install-only-core-functionality-of-mne/11840 "2026-05-23T16:31:15Z")
I am using MNE in my light weight pyqt eeg annotation desktop app. I use it to read edf data, do some processing (add low/high frequency filtering), and some channel manipulations like channel relabeling, changing montag… --- ## [Saving compressed data](https://mne.discourse.group/t/saving-compressed-data/11838)
**Author:** [@skjerns](https://mne.discourse.group/u/skjerns)\ **Replies:** 5\ **Last updated:** [May 22, 2026, 8:21am UTC](https://mne.discourse.group/t/saving-compressed-data/11838 "2026-05-22T08:21:51Z")
MNE also allows reading and writing of \`fif.gz\` files. However, that option does not seem to be available for BIDS: ValueError: Extension .fif.gz is not allowed. Use one of these extensions \[‘.CNT’, ‘.EEG’, ‘.bdf’, ‘.bi… --- ## [How to compute Welch PSD in Source Space after Epoch-level Autoreject](https://mne.discourse.group/t/how-to-compute-welch-psd-in-source-space-after-epoch-level-autoreject/11833)
**Author:** [@junbintian1998](https://mne.discourse.group/u/junbintian1998)\ **Replies:** 3\ **Last updated:** [May 22, 2026, 4:44am UTC](https://mne.discourse.group/t/how-to-compute-welch-psd-in-source-space-after-epoch-level-autoreject/11833 "2026-05-22T04:44:36Z")
Hi MNE Experts, I am processing a resting-state MEG dataset (275 channels) and using autoreject to clean my data after ICA. My goal is to compute Source Space Welch PSD for group-level statistics. However, I’m stuck on … --- ## [Issues in loading and visualising the calibration data in EyeLink .asc files](https://mne.discourse.group/t/issues-in-loading-and-visualising-the-calibration-data-in-eyelink-asc-files/11510)
**Author:** [@martalp](https://mne.discourse.group/u/martalp)\ **Replies:** 8\ **Last updated:** [May 21, 2026, 4:11pm UTC](https://mne.discourse.group/t/issues-in-loading-and-visualising-the-calibration-data-in-eyelink-asc-files/11510 "2026-05-21T16:11:29Z")
Platform Windows-11-10.0.26100-SP0 Python 3.13.5 Core mne 1.10.1 (latest release) numpy 2.1.3 (MKL 2023.1-Product with 14 threads) scipy 1.15.3 matplotl… --- ## [LCMV source localisation failed (frequency shift?)](https://mne.discourse.group/t/lcmv-source-localisation-failed-frequency-shift/11837)
**Author:** [@Yih](https://mne.discourse.group/u/Yih)\ **Replies:** 0\ **Last updated:** [May 20, 2026, 4:21pm UTC](https://mne.discourse.group/t/lcmv-source-localisation-failed-frequency-shift/11837 "2026-05-20T16:21:22Z")
:red\_question\_mark: If you have a question or issue with MNE-Python, please include the following info: MNE version: 1.10.1 operating system: e.g. Windows 11 Dear List: I have some questions regarding the source loca… --- ## [Variable sized y-axes in EEG plots](https://mne.discourse.group/t/variable-sized-y-axes-in-eeg-plots/11835)
**Author:** [@frankier](https://mne.discourse.group/u/frankier)\ **Replies:** 1\ **Last updated:** [May 18, 2026, 10:03am UTC](https://mne.discourse.group/t/variable-sized-y-axes-in-eeg-plots/11835 "2026-05-18T10:03:05Z")
Hi! This is a bit of a beginner question. I’ve seen various packages which plot EEGs stacking traces with varying sizes on the y-axis. Here’s an example: Currently, I can only figure out how to to use the .plot(…)e.g… --- ## [how to add vertical lines to the inner plots created by plot\_topo?](https://mne.discourse.group/t/how-to-add-vertical-lines-to-the-inner-plots-created-by-plot-topo/11777)
**Author:** [@Maysan\_Bader](https://mne.discourse.group/u/Maysan_Bader)\ **Replies:** 1\ **Last updated:** [May 15, 2026, 2:49pm UTC](https://mne.discourse.group/t/how-to-add-vertical-lines-to-the-inner-plots-created-by-plot-topo/11777 "2026-05-15T14:49:48Z")
:red\_question\_mark: If you have a question or issue with MNE-Python, please include the following info: MNE version: e.g. 1.11.0 operating system: e.g. Windows 10 I want to add vertical lines on the evoked response in… --- ## [Single-condition spatiotemporal cluster test on source epochs (dSPM): Test against 0 vs. late-window subtraction variants?](https://mne.discourse.group/t/single-condition-spatiotemporal-cluster-test-on-source-epochs-dspm-test-against-0-vs-late-window-subtraction-variants/11831)
**Author:** [@MKPTB2468](https://mne.discourse.group/u/MKPTB2468)\ **Replies:** 3\ **Last updated:** [May 15, 2026, 2:44pm UTC](https://mne.discourse.group/t/single-condition-spatiotemporal-cluster-test-on-source-epochs-dspm-test-against-0-vs-late-window-subtraction-variants/11831 "2026-05-15T14:44:27Z")
Hi everyone, I am running a single-participant, single-condition source analysis in MNE-Python, and I want to use a non-parametric spatiotemporal cluster permutation test to find significant cortical activation within a… --- ## [Epochs.apply\_function(channel\_wise=False, picks=…) silently ignores picks](https://mne.discourse.group/t/epochs-apply-function-channel-wise-false-picks-silently-ignores-picks/11828)
**Author:** [@bkowshik](https://mne.discourse.group/u/bkowshik)\ **Replies:** 2\ **Last updated:** [May 12, 2026, 8:36am UTC](https://mne.discourse.group/t/epochs-apply-function-channel-wise-false-picks-silently-ignores-picks/11828 "2026-05-12T08:36:47Z")
While documenting the shape passed to fun for Epochs.apply\_function (#13118), I noticed a behavioral asymmetry between Raw and Epochs that doesn’t appear to be documented anywhere. When channel\_wise=False: For Raw, pi… --- ## [Source estimates for evoked responses to continuous predictors](https://mne.discourse.group/t/source-estimates-for-evoked-responses-to-continuous-predictors/11810)
**Author:** [@linghjort](https://mne.discourse.group/u/linghjort)\ **Replies:** 2\ **Last updated:** [May 11, 2026, 12:56pm UTC](https://mne.discourse.group/t/source-estimates-for-evoked-responses-to-continuous-predictors/11810 "2026-05-11T12:56:29Z")
I analyse evoked responses to continuous predictors on 64-channel EEG data. I have adopted an approach from Nieuwland et al. (2020) where I run mixed-effects regression models over all electrodes and timepoints and contr… --- ## [Cannot read Nihon Kohden EEG-1200A V01.00 files (solved)](https://mne.discourse.group/t/cannot-read-nihon-kohden-eeg-1200a-v01-00-files-solved/11739)
**Author:** [@JohnAtl](https://mne.discourse.group/u/JohnAtl)\ **Replies:** 2\ **Last updated:** [May 8, 2026, 10:14am UTC](https://mne.discourse.group/t/cannot-read-nihon-kohden-eeg-1200a-v01-00-files-solved/11739 "2026-05-08T10:14:37Z")
MNE version: 1.11.0 operating system: Omarchy 3.4.1 (arch variant) import mne from mne.io import read\_raw\_nihon print(mne.\_\_version\_\_) 1.11.0 #%% nh=read\_raw\_nihon("../data/EEG2100/FA3620PH.EEG",preload=True) Loading F… --- ## [Don't know if I should use MNE for this project](https://mne.discourse.group/t/dont-know-if-i-should-use-mne-for-this-project/11824)
**Author:** [@Dragadow](https://mne.discourse.group/u/Dragadow)\ **Replies:** 6\ **Last updated:** [May 5, 2026, 11:22am UTC](https://mne.discourse.group/t/dont-know-if-i-should-use-mne-for-this-project/11824 "2026-05-05T11:22:35Z")
Hello everyone! Im pretty new to MNE. Im currently working on a project which should detect micro awakenings and other sleep related events and then trigger things based on that. Im using the Muse S Athena headband for t… --- ## [Different apparent channel locations between standard\_1020 and biosemi64 montages](https://mne.discourse.group/t/different-apparent-channel-locations-between-standard-1020-and-biosemi64-montages/11826)
**Author:** [@Jianyang](https://mne.discourse.group/u/Jianyang)\ **Replies:** 6\ **Last updated:** [May 5, 2026, 7:45am UTC](https://mne.discourse.group/t/different-apparent-channel-locations-between-standard-1020-and-biosemi64-montages/11826 "2026-05-05T07:45:28Z")
Hi everyone, I have a question about the channel locations in different built-in montages. I noticed that channels with the same standard labels can appear in quite different positions when using different MNE built-in… --- ## [Unexpected path and file names](https://mne.discourse.group/t/unexpected-path-and-file-names/11751)
**Author:** [@LeonardoMelloni](https://mne.discourse.group/u/LeonardoMelloni)\ **Replies:** 8\ **Last updated:** [May 5, 2026, 6:53am UTC](https://mne.discourse.group/t/unexpected-path-and-file-names/11751 "2026-05-05T06:53:19Z")
MNE version: 1.11.0 operating system: WSL: Ubuntu-22.04 Hi guys. Following the suggestion of @larsoner in this other topic, I tried to install the latest main of mne-bids-pipeline from GitHub to make sure to be u… --- ## [Line Noise(EEG)](https://mne.discourse.group/t/line-noise-eeg/11817)
**Author:** [@Three-Fire-S](https://mne.discourse.group/u/Three-Fire-S)\ **Replies:** 6\ **Last updated:** [April 30, 2026, 11:42am UTC](https://mne.discourse.group/t/line-noise-eeg/11817 "2026-04-30T11:42:11Z")
Hi everyone, I need some help with an issue in my EEG data. My power spectrum shows distinct sharp peaks at \*\*25 Hz, 50 Hz, 75 Hz, 100 Hz, and so on\*\* — these harmonics are far stronger than the actual brain signals aro… --- ## [implement eeglab runica informax with mne](https://mne.discourse.group/t/implement-eeglab-runica-informax-with-mne/11815)
**Author:** [@Mokita](https://mne.discourse.group/u/Mokita)\ **Replies:** 1\ **Last updated:** [April 28, 2026, 8:10am UTC](https://mne.discourse.group/t/implement-eeglab-runica-informax-with-mne/11815 "2026-04-28T08:10:43Z")
MNE version: 1.10 operating system: Windows 11 I am working on achieve the runica infomax of eeglab with mne in python. I have calculated the component number using pca cntNumCompForICA, and run EEG = pop\_runica(EEG,‘i… --- ## [Is it possible to manually define brainstem ROI in MEG volumetric source analysis?](https://mne.discourse.group/t/is-it-possible-to-manually-define-brainstem-roi-in-meg-volumetric-source-analysis/11801)
**Author:** [@tzcheng911](https://mne.discourse.group/u/tzcheng911)\ **Replies:** 2\ **Last updated:** [April 24, 2026, 4:09pm UTC](https://mne.discourse.group/t/is-it-possible-to-manually-define-brainstem-roi-in-meg-volumetric-source-analysis/11801 "2026-04-24T16:09:42Z")
Hi all, I’m working on a project aiming to localize brainstem responses using MEG. I’m currently using fsaverage with the aparc+aseg atlas for volumetric source reconstruction. I noticed that the brainstem is defined a… --- ## [No GUI window is displayed when running mne.gui.coregistration().](https://mne.discourse.group/t/no-gui-window-is-displayed-when-running-mne-gui-coregistration/11816)
**Author:** [@Jerry420](https://mne.discourse.group/u/Jerry420)\ **Replies:** 2\ **Last updated:** [April 22, 2026, 7:43am UTC](https://mne.discourse.group/t/no-gui-window-is-displayed-when-running-mne-gui-coregistration/11816 "2026-04-22T07:43:46Z")
MNE version: 1.12.1 operating system: Ubuntu Server 24.04.3 LTS Python version: 3.11.15(also tested following script in version 3.12.3) # %% import mne from mne.datasets import sample print(mne.\_\_version\_\_… [Previous page](https://mne.discourse.group/c/support-discussions/6.md) [Next page](https://mne.discourse.group/c/support-discussions/6.md?page=2)