# BEM surface error **URL:** \ **Category:** Mailing List Archive (read-only)\ **Tags:** list-archive\ **Created:** [June 19, 2018, 2:41pm UTC](https://mne.discourse.group/t/bem-surface-error/1551 "2018-06-19T14:41:02Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 19, 2018, 2:41pm UTC](https://mne.discourse.group/t/bem-surface-error/1551/1 "2018-06-19T14:41:02Z")
External Email - Use Caution Hi! I have several subjects that give the error "Surface inner skull is not completely inside surface outer skull" when I try to create the BEM-model. I know that there has been a thread \<[https://github.com/mne-tools/mne-python/issues/3291](https://github.com/mne-tools/mne-python/issues/3291)\> on this subject before, but here people only had "minor intersections". Judging from mne.viz.plot\_bem, I have a major intersection between surfaces. What would be the advisable approach in that case? Best, Karin -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20180619/7a8fa2bb/attachment.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20180619/7a8fa2bb/attachment.html) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 20, 2018, 3:01am UTC](https://mne.discourse.group/t/bem-surface-error/1551/2 "2018-06-20T03:01:13Z")
External Email - Use Caution Hi Karin, can you share a picture of plot\_bem? is it for EEG or MEG data? Alex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 20, 2018, 7:32am UTC](https://mne.discourse.group/t/bem-surface-error/1551/3 "2018-06-20T07:32:02Z")
External Email - Use Caution Thanks for your answer! It's MEG data. The bem\_plot() is attached Karin 2018-06-20 5:01 GMT+02:00 Alexandre Gramfort \: >         External Email - Use Caution > > Hi Karin, > > can you share a picture of plot\_bem? is it for EEG or MEG data? > > Alex > > \> > \> External Email - Use Caution > \> > \> Hi! > \> > \> I have several subjects that give the error "Surface inner skull is not > completely inside surface outer skull" when I try to create the BEM-model. > I know that there has been a thread on this subject before, but here people > only had "minor intersections". Judging from mne.viz.plot\_bem, I have a > major intersection between surfaces. What would be the advisable approach > in that case? > \> > \> Best, > \> Karin > \> \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > \> Mne\_analysis mailing list > \> Mne\_analysis at nmr.mgh.harvard.edu > \> [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) > \> > \> > \> The information in this e-mail is intended only for the person to whom > it is > \> addressed. If you believe this e-mail was sent to you in error and the > e-mail > \> contains patient information, please contact the Partners Compliance > HelpLine at > \> [MyComplianceReport.com: Compliance and Ethics Reporting](http://www.partners.org/complianceline) . If the e-mail was sent to you > in error > \> but does not contain patient information, please contact the sender and > properly > \> dispose of the e-mail. > > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ > Mne\_analysis mailing list > Mne\_analysis at nmr.mgh.harvard.edu > [Mne\_analysis Info Page](https://mail.nmr.mgh.harvard.edu/mailman/listinfo/mne_analysis) -------------- next part -------------- An HTML attachment was scrubbed... URL: [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20180620/288e8693/attachment-0001.html](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20180620/288e8693/attachment-0001.html) -------------- next part -------------- A non-text attachment was scrubbed... Name: Screenshot from 2018-06-19 15-21-47.png Type: image/png Size: 225086 bytes Desc: not available Url : [http://mail.nmr.mgh.harvard.edu/pipermail/mne\_analysis/attachments/20180620/288e8693/attachment-0001.png](http://mail.nmr.mgh.harvard.edu/pipermail/mne_analysis/attachments/20180620/288e8693/attachment-0001.png) ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 20, 2018, 5:15pm UTC](https://mne.discourse.group/t/bem-surface-error/1551/4 "2018-06-20T17:15:41Z")
External Email - Use Caution hi, ok not too bad. If it's MEG you should try with a single layer BEM and it should not complain. See : [https://martinos.org/mne/stable/auto\_tutorials/plot\_forward.html#compute-forward-solution](https://martinos.org/mne/stable/auto_tutorials/plot_forward.html#compute-forward-solution) HTH Alex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 20, 2018, 5:15pm UTC](https://mne.discourse.group/t/bem-surface-error/1551/5 "2018-06-20T17:15:59Z")
External Email - Use Caution hi, ok not too bad. If it's MEG you should try with a single layer BEM and it should not complain. See : [https://martinos.org/mne/stable/auto\_tutorials/plot\_forward.html#compute-forward-solution](https://martinos.org/mne/stable/auto_tutorials/plot_forward.html#compute-forward-solution) HTH Alex ---
**Author:** ![system](https://global.discourse-cdn.com/free1/uploads/mne/original/1X/85cc6bd2b69cb698a166dc6d880fb550510d0144.jpeg) [@system](https://mne.discourse.group/u/system)\ **Post date:** [June 20, 2018, 5:21pm UTC](https://mne.discourse.group/t/bem-surface-error/1551/6 "2018-06-20T17:21:04Z")
External Email - Use Caution Ok! Thank you! Skickat fr?n min iPhone