[Mne_analysis] mne_do_forward_solution Desired tag (unknown [3600]) not found Forward computation failed (see above)

[Matti Hamalainen]

Hi Dave,

I removed the loophole in MNE-C which caused the uninformative error message to appear. This fix will be present tomorrow in the "nightly build" on our website. If you the coordinate transformation file is empty, you will  get the correct error message.

- Matti
 
On Feb 22, 2014, at 7:46 PM, David Leitman <leitman at mail.med.upenn.edu> wrote:

> Hi Matti,
> 
> For some reason file COR-neuromag_101013.fif was created but it has zero bytes in it! must have not been saved or was corrupted. Will have to create a new COR file and try again :)
> 
> thanks for the help.
> 
> dave
> 
> 
> 
> 
> ----- Original Message -----
> From: "Matti Hamalainen" <msh at nmr.mgh.harvard.edu>
> To: "Alexandre Gramfort" <alexandre.gramfort at telecom-paristech.fr>
> Cc: "David I Leitman" <leitman at mail.med.upenn.edu>, "mne analysis" <mne_analysis at nmr.mgh.harvard.edu>
> Sent: Saturday, February 22, 2014 8:28:41 AM
> Subject: Re: [Mne_analysis] mne_do_forward_solution Desired tag (unknown [3600]) not found Forward computation failed (see above)
> 
> 
> Hi David,
> 
> The error message you get is fake. This does not directly relate to what happened. 
> 
> Is 
> 
> Read 2 source spaces a total of 20484 active source locations
> 
> indeed, the last log line before the error message? Can you send 
> 
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/mri/T1-neuromag/sets/COR-neuromag_101013.fif
> 
> to me. Next after the source space setup mne_forward_solution should read the MRI/MEG transform from this file but I cannot see how this could fail without producing the correct error message.
> 
> - Matti
> 
> 
> 
> On Feb 22, 2014, at 8:19 AM, Alexandre Gramfort <alexandre.gramfort at telecom-paristech.fr> wrote:
> 
>> hi David,
>> 
>> are you sure it's the same command line you type all the time?
>> 
>> is there a chance the measurement info changed between acquisitions?
>> 
>> btw I recommend you name your evoked data finishing with -ave.fif
>> Consistency in fif files naming really helps.
>> 
>> Alex
>> 
>> 
>> On Fri, Feb 21, 2014 at 10:47 PM, David I Leitman
>> <leitman at mail.med.upenn.edu> wrote:
>>> Hi all,
>>> 
>>> I was curious why I might be getting this error.... for most of my files
>>> this command works problem free?
>>> 
>>> -thanks Dave
>>> 
>>> Running Command Number mne_do_forward_solution    --subject $SUBJECT
>>> --src $SUBJECT-ico-5-src.fif    --bem $SUBJECT-5120-5120-5120-bem-sol.fif
>>> --meas $file    --eegonly    --fwd
>>> ${SUBJECT}_AR_noBC-epoched-${SUBJECT}-5-eeg-src-fwd.fif    --overwrite
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/meg/L16962_AR_noBC-epoched.fif
>>> 
>>> mne_forward_solution version 2.10 compiled at Sep  4 2013 04:24:23
>>> 
>>> Source space                 :
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/bem/L16962-ico-5-src.fif
>>> MRI -> head transform source :
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/mri/T1-neuromag/sets/COR-neuromag_101013.fif
>>> Measurement data             :
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/meg/L16962_AR_noBC-epoched.fif
>>> BEM model                    :
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/bem/L16962-5120-5120-5120-bem.fif
>>> Accurate field computations
>>> Do computations in head coordinates.
>>> Free source orientations
>>> Destination for the solution :
>>> L16962_AR_noBC-epoched-L16962-5-eeg-src-fwd.fif
>>> 
>>> Reading
>>> /mnt/thothdisk1/K_AWARD/K_DATA/MEG_DATA/L16962/bem/L16962-ico-5-src.fif...
>>> Read 2 source spaces a total of 20484 active source locations
>>> 
>>> Desired tag (unknown [3600]) not found
>>> Forward computation failed (see above)
>>> David I. Leitman PhD
>>> 
>>> Research Assistant Professor
>>> Department of Psychiatry-
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>>> Perelman School of Medicine
>>> University of Pennsylvania
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>>> http://davidileitman.com
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> 
> ---------
> 
> Matti Hamalainen, Ph.D.
> Athinoula A. Martinos Center for Biomedical Imaging
> Massachusetts General Hospital
> 
> msh at nmr.mgh.harvard.edu
> mhamalainen at partners.org
> 
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