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Thank you for your response. I have created the GitHub issue as requested:</div>
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https://github.com/fieldtrip/fieldtrip/issues/2616</div>
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Best wishes,</div>
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Naidile</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> fieldtrip <fieldtrip-bounces@science.ru.nl> on behalf of fieldtrip-request@science.ru.nl <fieldtrip-request@science.ru.nl><br>
<b>Sent:</b> 10 September 2026 15:30<br>
<b>To:</b> fieldtrip@science.ru.nl <fieldtrip@science.ru.nl><br>
<b>Subject:</b> fieldtrip Digest, Vol 190, Issue 4</font>
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Today's Topics:<br>
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1. Re: Missing dataset for OPM phantom tutorial<br>
(Schoffelen, J.M. (Jan Mathijs))<br>
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----------------------------------------------------------------------<br>
<br>
Message: 1<br>
Date: Thu, 10 Sep 2026 07:08:57 +0000<br>
From: "Schoffelen, J.M. (Jan Mathijs)"<br>
<janmathijs.schoffelen@donders.ru.nl><br>
To: FieldTrip discussion list <fieldtrip@science.ru.nl><br>
Subject: Re: [FieldTrip] Missing dataset for OPM phantom tutorial<br>
Message-ID: <41E72FA7-5423-403B-A602-C2252B77DE4C@donders.ru.nl><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hi Naidile,<br>
<br>
Yes indeed, you are right. I can confirm that these data are missing from the download server. Could you please make an issue out of this on the Fieldtrip github repo for follow up?<br>
<br>
Thanks and with best wishes,<br>
Jan-Mathijs Schoffelen<br>
<br>
On 9 Sep 2026, at 09:50, Naidile S - 240900566 - MITMPL via fieldtrip <fieldtrip@science.ru.nl> wrote:<br>
<br>
Dear FieldTrip community,<br>
I am trying to follow the tutorial “Using a MEG phantom for validation and OPM calibration”:<br>
<a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.fieldtriptoolbox.org%2Ftutorial%2Fsource%2Fopm_phantom%2F%253Chttps%3A%2F%2Fwww.fieldtriptoolbox.org%2Ftutorial%2Fsource%2Fopm_phantom%2F%253E&data=05%7C02%7Cfieldtrip%40science.ru.nl%7Cde452778314e4be4a3bc08df0f25aafd%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639246327830289939%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C40000%7C%7C%7C&sdata=TakuMZPvlFR9vUo9NtqB6licv%2FDhav6%2FhphVuJ3qk%2BI%3D&reserved=0" originalSrc="https://www.fieldtriptoolbox.org/tutorial/source/opm_phantom/%3Chttps://www.fieldtriptoolbox.org/tutorial/source/opm_phantom/%3E">https://www.fieldtriptoolbox.org/tutorial/source/opm_phantom/<https://www.fieldtriptoolbox.org/tutorial/source/opm_phantom/></a><br>
The tutorial refers to the following CTF dataset:<br>
phantom_3031000.01_20260721_01.ds<br>
It also requires:<br>
cad_mesh.mat<br>
However, the corresponding directory on the FieldTrip download server appears to be empty:<br>
<a href="https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdownload.fieldtriptoolbox.org%2Ftutorial%2Fopm_phantom%2F%253Chttps%3A%2F%2Fdownload.fieldtriptoolbox.org%2Ftutorial%2Fopm_phantom%2F%253E&data=05%7C02%7Cfieldtrip%40science.ru.nl%7Cde452778314e4be4a3bc08df0f25aafd%7C084578d9400d4a5aa7c7e76ca47af400%7C1%7C0%7C639246327830300551%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWUsIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C40000%7C%7C%7C&sdata=979q6O89Ix%2F51PhSXEdl5leBgzsovjCrDbKVI%2BEMc1I%3D&reserved=0" originalSrc="https://download.fieldtriptoolbox.org/tutorial/opm_phantom/%3Chttps://download.fieldtriptoolbox.org/tutorial/opm_phantom/%3E">https://download.fieldtriptoolbox.org/tutorial/opm_phantom/<https://download.fieldtriptoolbox.org/tutorial/opm_phantom/></a><br>
Could you please let me know where I can download the CTF phantom dataset and cad_mesh.mat? If available, I would also appreciate information about downloading the FieldLine OPM recording used in the tutorial.<br>
Thank you for your help.<br>
Kind regards,<br>
Naidile S<br>
<br>
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