I think the reason you get that type of error is because Matlab thinks you 
are trying to reference a variable called 'm' which is a member of a 
struct called 'matlabfile'.  Since the 'm' variable doesn't exist, it is 
"unexpected".

On Tue, 26 Apr 2011, Douglas Greve wrote:

> Oh, that's right, forgot that you don't give it the .m. The problem with
> using this method was that it would not automatically quit when it got
> to the end of the script (or if there was an error in the script, it
> would just hang there). Any ideas how to overcome that?
>
> thanks
> doug
>
> On 4/26/11 11:27 AM, Louis Nicholas Vinke wrote:
>> Try running the command without the '.m'.
>> -Louis
>>
>> On Mon, 25 Apr 2011, Maryam Vaziri Pashkam wrote:
>>
>>> There is an error:
>>>
>>> ??? Error: Unexpected MATLAB operator when I run matlab -r matlabfile.m
>>> I wanted to change the mcparams2extreg to see if it works but I don't know
>>> how to change it and where it is located.
>>>
>>> Maryam
>>>
>>> On Mon, Apr 25, 2011 at 3:22 PM, Douglas 
>>> Greve<gr...@nmr.mgh.harvard.edu>wrote:
>>>
>>>> Yea, I vaguely remember this problem with 4.5 and the macs. Try running
>>>> this from a terminal (not from matlab):
>>>>
>>>> matlab -r matlabfile.m
>>>>
>>>> where matlabfile.m is the file created with -monly. If this works you can
>>>> change the call to matlab from mcparams2extreg from
>>>>
>>>> cat $MLF | $MATLAB -display iconic | tee -a $LF
>>>>
>>>> to
>>>>
>>>> $MATLAB -r $MLF -display iconic | tee -a $LF
>>>>
>>>> doug
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> On 4/25/11 2:49 PM, Maryam Vaziri Pashkam wrote:
>>>>
>>>> Hi Dough,
>>>>
>>>>   The generated matlab programs works from within matlab and generates
>>>> mcextreg.bhdr and mcextreg_000.bfloat and mcextreg_000.hdr.
>>>>
>>>>   It seems that there is a problem calling matlab from terminal? any idea
>>>> how I can fix this? I have two versions on Matlab on my computer. Could 
>>>> this
>>>> be a source of the problem? I checked the program in both matlabs and it
>>>> works when run from inside Matlab.
>>>>
>>>>   Maryam
>>>>
>>>>
>>>> On Mon, Apr 25, 2011 at 4:32 AM, Douglas 
>>>> Greve<gr...@nmr.mgh.harvard.edu>wrote:
>>>>
>>>>>   Try running mcparams2extreg with the -monly option to create a matlab
>>>>> file. Then run that matlab file from inside matlab. If that fails in the
>>>>> same way, send me the matlab file.
>>>>>
>>>>> doug
>>>>>
>>>>>
>>>>> On 4/25/11 4:02 AM, Maryam Vaziri Pashkam wrote:
>>>>>
>>>>> Hi Dough,
>>>>>
>>>>> I have attached the log file. It does not give any extra information. I
>>>>> ran the command you told me and gave me the exact same errors. It looks 
>>>>> like
>>>>> there is a problem with that command and reading of the fmc.mcdat file. I
>>>>> have also attached the fmc.mcdat file from run 6.
>>>>> Any other idea?
>>>>>
>>>>>   Thanks,
>>>>> Maryam
>>>>>
>>>>> On Mon, Apr 25, 2011 at 3:44 
>>>>> AM,<freesurfer-requ...@nmr.mgh.harvard.edu>wrote:
>>>>>
>>>>>> Send Freesurfer mailing list submissions to
>>>>>>         freesurfer@nmr.mgh.harvard.edu
>>>>>>
>>>>>> To subscribe or unsubscribe via the World Wide Web, visit
>>>>>>         https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer
>>>>>> or, via email, send a message with subject or body 'help' to
>>>>>>         freesurfer-requ...@nmr.mgh.harvard.edu
>>>>>>
>>>>>> You can reach the person managing the list at
>>>>>>         freesurfer-ow...@nmr.mgh.harvard.edu
>>>>>>
>>>>>> When replying, please edit your Subject line so it is more specific
>>>>>> than "Re: Contents of Freesurfer digest..."
>>>>>>
>>>>>>
>>>>>> Today's Topics:
>>>>>>
>>>>>>    1. Fwd: error with motion correction (Maryam Vaziri Pashkam)
>>>>>>    2. Re: Fwd: error with motion correction (Douglas Greve)
>>>>>>
>>>>>>
>>>>>> ----------------------------------------------------------------------
>>>>>>
>>>>>> Message: 1
>>>>>> Date: Sun, 24 Apr 2011 21:01:43 -0400
>>>>>> From: Maryam Vaziri Pashkam<mvazir...@gmail.com>
>>>>>> Subject: [Freesurfer] Fwd: error with motion correction
>>>>>> To: freesurfer@nmr.mgh.harvard.edu
>>>>>> Message-ID:<banlktikkajvqp5bxvd5e2mowqvwbrev...@mail.gmail.com>
>>>>>> Content-Type: text/plain; charset="iso-8859-1"
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>> I am running into trouble with motion correction on my Mac and freesurfer
>>>>>> 4.5.
>>>>>> Originally I ran preproc-sess and got an error from mc-sess in the part
>>>>>> (i
>>>>>> think) that runs the mcextreg. I ran mc-sess and the same error happened
>>>>>> (I
>>>>>> have copy pasted the log bellow).
>>>>>> It seems like the matlab program that runs mcparams2extreg cannot read
>>>>>> the
>>>>>> fmc.mcdat file. when I did textread('fmc.mcdat') in matlab, I could open
>>>>>> the
>>>>>> file and it looked perfectly fine to me with the correct number of TR's.
>>>>>> Any idea where the problem might be?
>>>>>>
>>>>>> Maryam
>>>>>>
>>>>>> preproc-sess -nosmooth -i f -sf sessid -df sessdir
>>>>>> --------------------------------------------------------------
>>>>>> preproc-sess logfile is log/preproc-sess.log
>>>>>> --------------------------------------------------------------
>>>>>> instem   f
>>>>>> mc   1     f fmc
>>>>>> stc  0     fmc
>>>>>> sm   0
>>>>>> mask 1   brain
>>>>>> 110419_xu_PDM1_02_PDM MC -----------------------------
>>>>>> Sun Apr 24 20:42:29 EDT 2011
>>>>>> /Users/maryam/mri-space/studies/PDM1/PDM1
>>>>>> mc-sess -fstem f -fmcstem fmc -s 110419_xu_PDM1_02_PDM -d
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata -fsd bold -new -update
>>>>>> -no-inorm
>>>>>> ----------------------------------------
>>>>>> Logfile is
>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/PDM1/log/mc-110419_xu_PDM1_02_PDM-bold.log
>>>>>> -------------------------------------------
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM
>>>>>> RunList: 005 006 007 008 011 012 013 014
>>>>>> Targ Stem is 005/f
>>>>>> Update not needed
>>>>>> -rw-r--r--  1 maryam  staff  129203552 Apr 24 20:12 005/fmc.nii
>>>>>> -rw-r--r--  1 maryam  staff   64601952 Apr 24 19:12 005/f.nii
>>>>>>   ------- ************************** -----------
>>>>>>   ------- Motion Correcting Run 006 -----------
>>>>>>   ------- ************************** -----------
>>>>>> sess = 110419_xu_PDM1_02_PDM
>>>>>> Sun Apr 24 20:42:30 EDT 2011
>>>>>> mc-afni2 --i 006/f.nii --t 005/f.nii --frame 0 --o 006/fmc.nii --mcdat
>>>>>> 006/fmc.mcdat
>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>> mri_info --nframes --o /tmp/mriinfo.2758 005/f.nii
>>>>>> log file is 006/fmc.nii.mclog
>>>>>> mcdat file is 006/fmc.mcdat
>>>>>> tmp dir is 006/tmp.mc-afni2.2758
>>>>>> #@# --------------------------------
>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>> mri_convert 005/f.nii 006/tmp.mc-afni2.2758/tempvol.nii.gz --nskip 0
>>>>>> --ndrop
>>>>>> 205 -odt float
>>>>>> mri_convert 005/f.nii 006/tmp.mc-afni2.2758/tempvol.nii.gz --nskip 0
>>>>>> --ndrop
>>>>>> 205 -odt float
>>>>>> nskip = 0
>>>>>> ndrop = 205
>>>>>> $Id: mri_convert.c,v 1.146.2.5 2009/04/08 18:40:23 nicks Exp $
>>>>>> reading from 005/f.nii...
>>>>>> TR=2000.00, TE=0.00, TI=0.00, flip angle=0.00
>>>>>> i_ras = (-1, -0.000171665, -3.15037e-05)
>>>>>> j_ras = (0.000174532, -0.983572, -0.180519)
>>>>>> k_ras = (-2.07852e-18, -0.180519, 0.983572)
>>>>>> changing data type from 4 to 3 (noscale = 0)...
>>>>>> Dropping last 205 frames
>>>>>> writing to 006/tmp.mc-afni2.2758/tempvol.nii.gz...
>>>>>> #@# --------------------------------
>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>> mri_convert 006/f.nii 006/tmp.mc-afni2.2758/invol.nii.gz -odt float
>>>>>> mri_convert 006/f.nii 006/tmp.mc-afni2.2758/invol.nii.gz -odt float
>>>>>> $Id: mri_convert.c,v 1.146.2.5 2009/04/08 18:40:23 nicks Exp $
>>>>>> reading from 006/f.nii...
>>>>>> TR=2000.00, TE=0.00, TI=0.00, flip angle=0.00
>>>>>> i_ras = (-1, -0.000171665, -3.15037e-05)
>>>>>> j_ras = (0.000174532, -0.983572, -0.180519)
>>>>>> k_ras = (-2.07852e-18, -0.180519, 0.983572)
>>>>>> changing data type from 4 to 3 (noscale = 0)...
>>>>>> writing to 006/tmp.mc-afni2.2758/invol.nii.gz...
>>>>>> #@# --------------------------------
>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>> 3dvolreg -verbose -dfile 006/fmc.mcdat -base
>>>>>> 006/tmp.mc-afni2.2758/tempvol.nii.gz -prefix
>>>>>> 006/tmp.mc-afni2.2758/outvol.nii.gz 006/tmp.mc-afni2.2758/invol.nii.gz
>>>>>> ++ 3dvolreg: AFNI version=AFNI_2008_02_01_1144 (Jul  3 2008) [32-bit]
>>>>>> ++ Authored by: RW Cox
>>>>>> *+ WARNING:   If you are performing spatial transformations on an oblique
>>>>>> dset,
>>>>>>   such as 006/tmp.mc-afni2.2758/tempvol.nii.gz,
>>>>>>   or viewing/combining it with volumes of differing obliquity,
>>>>>>   you should consider running:
>>>>>>      3dWarp -deoblique
>>>>>>   on this and  other oblique datasets in the same session.
>>>>>>   See 3dWarp -help for details.
>>>>>> ++ Oblique dataset:006/tmp.mc-afni2.2758/tempvol.nii.gz is 10.399981
>>>>>> degrees
>>>>>> from plumb.
>>>>>> ++ Reading in base dataset 006/tmp.mc-afni2.2758/tempvol.nii.gz
>>>>>> ++ Oblique dataset:006/tmp.mc-afni2.2758/invol.nii.gz is 10.399981
>>>>>> degrees
>>>>>> from plumb.
>>>>>> ++ Reading input dataset 006/tmp.mc-afni2.2758/invol.nii.gz
>>>>>> ++ Edging: x=4 y=4 z=2
>>>>>> ++ Creating mask for -maxdisp
>>>>>>   + Automask has 57667 voxels
>>>>>>   + 10333 voxels left in -maxdisp mask after erosion
>>>>>> ++ Initializing alignment base
>>>>>> ++ Starting final pass on 206 sub-bricks:
>>>>>>
>>>>>> 0..1..2..3..4..5..6..7..8..9..10..11..12..13..14..15..16..17..18..19..20..21..22..23..24..25..26..27..28..29..30..31..32..33..34..35..36..37..38..39..40..41..42..43..44..45..46..47..48..49..50..51..52..53..54..55..56..57..58..59..60..61..62..63..64..65..66..67..68..69..70..71..72..73..74..75..76..77..78..79..80..81..82..83..84..85..86..87..88..89..90..91..92..93..94..95..96..97..98..99..100..101..102..103..104..105..106..107..108..109..110..111..112..113..114..115..116..117..118..119..120..121..122..123..124..125..126..127..128..129..130..131..132..133..134..135..136..137..138..139..140..141..142..143..144..145..146..147..148..149..150..151..152..153..154..155..156..157..158..159..160..161..162..163..164..165..166..167..168..169..170..171..172..173..174..175..176..177..178..179..180..181..182..183..184..185..186..187..188..189..190..191..192..193..194..195..196..197..198..199..200..201..202..203..204..205..
>>>>>> ++ CPU time for realignment=16.6 s  [=0.0808 s/sub-brick]
>>>>>> ++ Min : roll=-0.008  pitch=-0.103  yaw=-0.096  dS=+0.255  dL=-0.019
>>>>>>   dP=-0.151
>>>>>> ++ Mean: roll=+0.031  pitch=-0.011  yaw=-0.045  dS=+0.619  dL=+0.037
>>>>>>   dP=-0.055
>>>>>> ++ Max : roll=+0.060  pitch=+0.112  yaw=-0.010  dS=+0.693  dL=+0.075
>>>>>>   dP=+0.015
>>>>>> ++ Max displacements (mm) for each sub-brick:
>>>>>>   0.49 0.65 0.63 0.74 0.69 0.75 0.71 0.77 0.70 0.76 0.67 0.77 0.72 0.73
>>>>>> 0.66
>>>>>> 0.67 0.67 0.67 0.69 0.70 0.72 0.66 0.71 0.68 0.72 0.67 0.73 0.68 0.73
>>>>>> 0.66
>>>>>> 0.73 0.66 0.70 0.64 0.72 0.69 0.71 0.71 0.72 0.66 0.66 0.67 0.72 0.70
>>>>>> 0.71
>>>>>> 0.72 0.71 0.69 0.72 0.72 0.71 0.72 0.72 0.69 0.71 0.74 0.73 0.69 0.72
>>>>>> 0.72
>>>>>> 0.76 0.76 0.79 0.73 0.75 0.74 0.75 0.75 0.71 0.74 0.67 0.72 0.65 0.72
>>>>>> 0.65
>>>>>> 0.69 0.69 0.65 0.68 0.64 0.72 0.67 0.67 0.68 0.69 0.65 0.73 0.67 0.71
>>>>>> 0.69
>>>>>> 0.73 0.72 0.76 0.74 0.72 0.66 0.68 0.69 0.69 0.68 0.68 0.70 0.73 0.70
>>>>>> 0.73
>>>>>> 0.78 0.74 0.73 0.75 0.74 0.72 0.74 0.63 0.66 0.68 0.74 0.72 0.74 0.79
>>>>>> 0.74
>>>>>> 0.74 0.76 0.79 0.79 0.74 0.76 0.70 0.75 0.72 0.78 0.74 0.78 0.76 0.80
>>>>>> 0.76
>>>>>> 0.79 0.77 0.76 0.76 0.75 0.73 0.80 0.78 0.81 0.78 0.84 0.76 0.79 0.77
>>>>>> 0.79
>>>>>> 0.76 0.83 0.77 0.79 0.77 0.84 0.76 0.80 0.77 0.81 0.72 0.79 0.74 0.80
>>>>>> 0.77
>>>>>> 0.83 0.81 0.82 0.76 0.81 0.75 0.78 0.74 0.75 0.71 0.75 0.73 0.77 0.77
>>>>>> 0.80
>>>>>> 0.77 0.80 0.75 0.73 0.77 0.72 0.76 0.72 0.76 0.72 0.72 0.69 0.66 0.68
>>>>>> 0.65
>>>>>> 0.68 0.64 0.70 0.62 0.70 0.62 0.69 0.67 0.74 0.75 0.74
>>>>>> ++ Max displacement in automask = 0.84 (mm) at sub-brick 145
>>>>>> ++ Wrote dataset to disk in 006/tmp.mc-afni2.2758/outvol.nii.gz
>>>>>> #@# --------------------------------
>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>> mri_convert 006/tmp.mc-afni2.2758/outvol.nii.gz 006/fmc.nii --in_like
>>>>>> 005/f.nii
>>>>>> mri_convert 006/tmp.mc-afni2.2758/outvol.nii.gz 006/fmc.nii --in_like
>>>>>> 005/f.nii
>>>>>> reading info from 005/f.nii...
>>>>>> $Id: mri_convert.c,v 1.146.2.5 2009/04/08 18:40:23 nicks Exp $
>>>>>> reading from 006/tmp.mc-afni2.2758/outvol.nii.gz...
>>>>>> TR=2000.00, TE=0.00, TI=0.00, flip angle=0.00
>>>>>> i_ras = (-1, -0.000171665, -3.15037e-05)
>>>>>> j_ras = (0.000174532, -0.983572, -0.180519)
>>>>>> k_ras = (-2.07852e-18, -0.180519, 0.983572)
>>>>>> writing to 006/fmc.nii...
>>>>>> ... cleaning up ....
>>>>>> Sun Apr 24 20:43:59 EDT 2011
>>>>>> mc-afni2 done
>>>>>> INFO: Making external regressor from mc params
>>>>>> mcparams2extreg -mcfile 006/fmc.mcdat -northog 6 -extreg 006/mcextreg
>>>>>> Logfile is 006/mcparams2extreg.log
>>>>>> ----------- Matlab file --------------
>>>>>>   mcfile = '006/fmc.mcdat';
>>>>>>   extreg = '006/mcextreg';
>>>>>>   nkeep     = [];
>>>>>>   northog   = [6];
>>>>>>   pctorthog = [];
>>>>>>   monly     = 0;
>>>>>>
>>>>>>   mc = textread(mcfile);
>>>>>>   mc = mc(:,2:7);
>>>>>>   ntrs = size(mc,1);
>>>>>>   if(ntrs<  6)
>>>>>>     fprintf('ERROR: ntrs = %d<  6\n',ntrs);
>>>>>>     if(~monly)
>>>>>>       fprintf('Quiting matlab\n');
>>>>>>       quit;
>>>>>>       fprintf('should not be here\n');
>>>>>>     end
>>>>>>   end
>>>>>>
>>>>>>   if(~isempty(nkeep))
>>>>>>     x = mc(:,1:nkeep);
>>>>>>   elseif(~isempty(northog))
>>>>>>     [u s v] = svd(mc);
>>>>>>     ds = diag(s);
>>>>>>     pct = 100*cumsum(ds)/sum(ds);
>>>>>>     x = u(:,1:northog);
>>>>>>     nkeep = northog;
>>>>>>     fprintf('INFO: northog = %d, pct = %g\n',northog,pct(nkeep));
>>>>>>   else
>>>>>>     [u s v] = svd(mc);
>>>>>>     ds = diag(s);
>>>>>>     pct = 100*cumsum(ds)/sum(ds);
>>>>>>     nkeep = min(find(pct>  pctorthog));
>>>>>>     x = u(:,1:nkeep);
>>>>>>     fprintf('INFO: pctorthog = %g, nkeep = %d\n',pctorthog,nkeep);
>>>>>>   end
>>>>>>
>>>>>>   x2 = zeros(1,1,nkeep,ntrs);
>>>>>>   x2(1,1,:,:) = x'; %'
>>>>>>   %fmri_svbvolume(x2,extreg);
>>>>>>
>>>>>>   mri.vol = permute(x2,[1 3 2 4]);
>>>>>>   mri.tr = 0;
>>>>>>   mri.flip_angle = 0;
>>>>>>   mri.te = 0;
>>>>>>   mri.ti = 0;
>>>>>>   mri.vox2ras0 = eye(4);
>>>>>>   mri.xsize = 1;
>>>>>>   mri.ysize = 1;
>>>>>>   mri.zsize = 1;
>>>>>>   mri.volres = [1 1 1];
>>>>>>   mri.volsize = [size(mri.vol,1) size(mri.vol,2) size(mri.vol,3)];
>>>>>>   fname = sprintf('%s.bhdr',extreg);
>>>>>>   MRIwrite(mri,fname);
>>>>>>
>>>>>> quit;
>>>>>>
>>>>>> -----------------------------------
>>>>>> ------------------------------------------
>>>>>> ------- matlab output --------------------
>>>>>> Warning: Unable to open display 'iconic'.  You will not be able to
>>>>>> display
>>>>>> graphics on the screen.
>>>>>>
>>>>>>                             <  M A T L A B (R)>
>>>>>>                   Copyright 1984-2009 The MathWorks, Inc.
>>>>>>                  Version 7.9.0.529 (R2009b) 64-bit (maci64)
>>>>>>                               August 12, 2009
>>>>>>
>>>>>>   To get started, type one of these: helpwin, helpdesk, or demo.
>>>>>>   For product information, visit www.mathworks.com.
>>>>>>
>>>>>>>>>>>>>>>>>>>>>> ??? Error using ==>  textread at 167
>>>>>> File not found.
>>>>>>
>>>>>>>> ??? Undefined variable mc.
>>>>>>>> ??? Undefined function or variable 'mc'.
>>>>>>>> ??? Undefined function or variable 'ntrs'.
>>>>>>>>>> ??? Undefined function or variable 'mc'.
>>>>>>>>>> ??? Undefined function or variable 'ntrs'.
>>>>>>>> ??? Undefined function or variable 'x'.
>>>>>>>>>>>> ??? Undefined function or variable 'x2'.
>>>>>>>>>>>>>>>>>>>>>>>>>> ??? Reference to non-existent field 'vol'.
>>>>>>>>>> ??? Reference to non-existent field 'vol'.
>>>>>> Error in ==>  MRIwrite at 70
>>>>>>   bmri.voldim = [size(mri.vol,1) size(mri.vol,2) size(mri.vol,3)];
>>>>>>
>>>>>>>>>> ------------------------------------------
>>>>>> ERROR: output not created
>>>>>> ERROR: mc-sess failed
>>>>>> -------------- next part --------------
>>>>>> An HTML attachment was scrubbed...
>>>>>> URL:
>>>>>> http://mail.nmr.mgh.harvard.edu/pipermail/freesurfer/attachments/20110424/7835b719/attachment-0001.html
>>>>>>
>>>>>> ------------------------------
>>>>>>
>>>>>> Message: 2
>>>>>> Date: Mon, 25 Apr 2011 03:43:59 -0400
>>>>>> From: Douglas Greve<gr...@nmr.mgh.harvard.edu>
>>>>>> Subject: Re: [Freesurfer] Fwd: error with motion correction
>>>>>> To: freesurfer@nmr.mgh.harvard.edu
>>>>>> Message-ID:<4db5263f.2060...@nmr.mgh.harvard.edu>
>>>>>> Content-Type: text/plain; charset="iso-8859-1"
>>>>>>
>>>>>> Hi Maryam, I don't know what is going on. Does 006/mcparams2extreg.log
>>>>>> have anymore information? Can you run
>>>>>>
>>>>>> cd 110419_xu_PDM1_02_PDM/bold
>>>>>> mcparams2extreg -mcfile 006/fmc.mcdat -northog 6 -extreg 006/mcextreg
>>>>>>
>>>>>> doug
>>>>>>
>>>>>> On 4/24/11 9:01 PM, Maryam Vaziri Pashkam wrote:
>>>>>>> Hi,
>>>>>>>
>>>>>>> I am running into trouble with motion correction on my Mac and
>>>>>>> freesurfer 4.5.
>>>>>>> Originally I ran preproc-sess and got an error from mc-sess in the
>>>>>>> part (i think) that runs the mcextreg. I ran mc-sess and the same
>>>>>>> error happened (I have copy pasted the log bellow).
>>>>>>> It seems like the matlab program that runs mcparams2extreg cannot read
>>>>>>> the fmc.mcdat file. when I did textread('fmc.mcdat') in matlab, I
>>>>>>> could open the file and it looked perfectly fine to me with the
>>>>>>> correct number of TR's.
>>>>>>> Any idea where the problem might be?
>>>>>>>
>>>>>>> Maryam
>>>>>>>
>>>>>>> preproc-sess -nosmooth -i f -sf sessid -df sessdir
>>>>>>> --------------------------------------------------------------
>>>>>>> preproc-sess logfile is log/preproc-sess.log
>>>>>>> --------------------------------------------------------------
>>>>>>> instem   f
>>>>>>> mc   1     f fmc
>>>>>>> stc  0     fmc
>>>>>>> sm   0
>>>>>>> mask 1   brain
>>>>>>> 110419_xu_PDM1_02_PDM MC -----------------------------
>>>>>>> Sun Apr 24 20:42:29 EDT 2011
>>>>>>> /Users/maryam/mri-space/studies/PDM1/PDM1
>>>>>>> mc-sess -fstem f -fmcstem fmc -s 110419_xu_PDM1_02_PDM -d
>>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata -fsd bold -new -update
>>>>>>> -no-inorm
>>>>>>> ----------------------------------------
>>>>>>> Logfile is
>>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/PDM1/log/mc-110419_xu_PDM1_02_PDM-bold.log
>>>>>>> -------------------------------------------
>>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM
>>>>>>> RunList: 005 006 007 008 011 012 013 014
>>>>>>> Targ Stem is 005/f
>>>>>>> Update not needed
>>>>>>> -rw-r--r--  1 maryam  staff  129203552 Apr 24 20:12 005/fmc.nii
>>>>>>> -rw-r--r--  1 maryam  staff   64601952 Apr 24 19:12 005/f.nii
>>>>>>>    ------- ************************** -----------
>>>>>>>    ------- Motion Correcting Run 006 -----------
>>>>>>>    ------- ************************** -----------
>>>>>>> sess = 110419_xu_PDM1_02_PDM
>>>>>>> Sun Apr 24 20:42:30 EDT 2011
>>>>>>> mc-afni2 --i 006/f.nii --t 005/f.nii --frame 0 --o 006/fmc.nii --mcdat
>>>>>>> 006/fmc.mcdat
>>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>>> mri_info --nframes --o /tmp/mriinfo.2758 005/f.nii
>>>>>>> log file is 006/fmc.nii.mclog
>>>>>>> mcdat file is 006/fmc.mcdat
>>>>>>> tmp dir is 006/tmp.mc-afni2.2758
>>>>>>> #@# --------------------------------
>>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>>> mri_convert 005/f.nii 006/tmp.mc-afni2.2758/tempvol.nii.gz --nskip 0
>>>>>>> --ndrop 205 -odt float
>>>>>>> mri_convert 005/f.nii 006/tmp.mc-afni2.2758/tempvol.nii.gz --nskip 0
>>>>>>> --ndrop 205 -odt float
>>>>>>> nskip = 0
>>>>>>> ndrop = 205
>>>>>>> $Id: mri_convert.c,v 1.146.2.5 2009/04/08 18:40:23 nicks Exp $
>>>>>>> reading from 005/f.nii...
>>>>>>> TR=2000.00, TE=0.00, TI=0.00, flip angle=0.00
>>>>>>> i_ras = (-1, -0.000171665, -3.15037e-05)
>>>>>>> j_ras = (0.000174532, -0.983572, -0.180519)
>>>>>>> k_ras = (-2.07852e-18, -0.180519, 0.983572)
>>>>>>> changing data type from 4 to 3 (noscale = 0)...
>>>>>>> Dropping last 205 frames
>>>>>>> writing to 006/tmp.mc-afni2.2758/tempvol.nii.gz...
>>>>>>> #@# --------------------------------
>>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>>> mri_convert 006/f.nii 006/tmp.mc-afni2.2758/invol.nii.gz -odt float
>>>>>>> mri_convert 006/f.nii 006/tmp.mc-afni2.2758/invol.nii.gz -odt float
>>>>>>> $Id: mri_convert.c,v 1.146.2.5 2009/04/08 18:40:23 nicks Exp $
>>>>>>> reading from 006/f.nii...
>>>>>>> TR=2000.00, TE=0.00, TI=0.00, flip angle=0.00
>>>>>>> i_ras = (-1, -0.000171665, -3.15037e-05)
>>>>>>> j_ras = (0.000174532, -0.983572, -0.180519)
>>>>>>> k_ras = (-2.07852e-18, -0.180519, 0.983572)
>>>>>>> changing data type from 4 to 3 (noscale = 0)...
>>>>>>> writing to 006/tmp.mc-afni2.2758/invol.nii.gz...
>>>>>>> #@# --------------------------------
>>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>>> 3dvolreg -verbose -dfile 006/fmc.mcdat -base
>>>>>>> 006/tmp.mc-afni2.2758/tempvol.nii.gz -prefix
>>>>>>> 006/tmp.mc-afni2.2758/outvol.nii.gz 006/tmp.mc-afni2.2758/invol.nii.gz
>>>>>>> ++ 3dvolreg: AFNI version=AFNI_2008_02_01_1144 (Jul  3 2008) [32-bit]
>>>>>>> ++ Authored by: RW Cox
>>>>>>> *+ WARNING:   If you are performing spatial transformations on an
>>>>>>> oblique dset,
>>>>>>>    such as 006/tmp.mc-afni2.2758/tempvol.nii.gz,
>>>>>>>    or viewing/combining it with volumes of differing obliquity,
>>>>>>>    you should consider running:
>>>>>>>       3dWarp -deoblique
>>>>>>>    on this and  other oblique datasets in the same session.
>>>>>>>   See 3dWarp -help for details.
>>>>>>> ++ Oblique dataset:006/tmp.mc-afni2.2758/tempvol.nii.gz is 10.399981
>>>>>>> degrees from plumb.
>>>>>>> ++ Reading in base dataset 006/tmp.mc-afni2.2758/tempvol.nii.gz
>>>>>>> ++ Oblique dataset:006/tmp.mc-afni2.2758/invol.nii.gz is 10.399981
>>>>>>> degrees from plumb.
>>>>>>> ++ Reading input dataset 006/tmp.mc-afni2.2758/invol.nii.gz
>>>>>>> ++ Edging: x=4 y=4 z=2
>>>>>>> ++ Creating mask for -maxdisp
>>>>>>>   + Automask has 57667 voxels
>>>>>>>   + 10333 voxels left in -maxdisp mask after erosion
>>>>>>> ++ Initializing alignment base
>>>>>>> ++ Starting final pass on 206 sub-bricks:
>>>>>>>
>>>>>> 0..1..2..3..4..5..6..7..8..9..10..11..12..13..14..15..16..17..18..19..20..21..22..23..24..25..26..27..28..29..30..31..32..33..34..35..36..37..38..39..40..41..42..43..44..45..46..47..48..49..50..51..52..53..54..55..56..57..58..59..60..61..62..63..64..65..66..67..68..69..70..71..72..73..74..75..76..77..78..79..80..81..82..83..84..85..86..87..88..89..90..91..92..93..94..95..96..97..98..99..100..101..102..103..104..105..106..107..108..109..110..111..112..113..114..115..116..117..118..119..120..121..122..123..124..125..126..127..128..129..130..131..132..133..134..135..136..137..138..139..140..141..142..143..144..145..146..147..148..149..150..151..152..153..154..155..156..157..158..159..160..161..162..163..164..165..166..167..168..169..170..171..172..173..174..175..176..177..178..179..180..181..182..183..184..185..186..187..188..189..190..191..192..193..194..195..196..197..198..199..200..201..202..203..204..205..
>>>>>>> ++ CPU time for realignment=16.6 s  [=0.0808 s/sub-brick]
>>>>>>> ++ Min : roll=-0.008  pitch=-0.103  yaw=-0.096  dS=+0.255  dL=-0.019
>>>>>>>   dP=-0.151
>>>>>>> ++ Mean: roll=+0.031  pitch=-0.011  yaw=-0.045  dS=+0.619  dL=+0.037
>>>>>>>   dP=-0.055
>>>>>>> ++ Max : roll=+0.060  pitch=+0.112  yaw=-0.010  dS=+0.693  dL=+0.075
>>>>>>>   dP=+0.015
>>>>>>> ++ Max displacements (mm) for each sub-brick:
>>>>>>>   0.49 0.65 0.63 0.74 0.69 0.75 0.71 0.77 0.70 0.76 0.67 0.77 0.72 0.73
>>>>>>> 0.66 0.67 0.67 0.67 0.69 0.70 0.72 0.66 0.71 0.68 0.72 0.67 0.73 0.68
>>>>>>> 0.73 0.66 0.73 0.66 0.70 0.64 0.72 0.69 0.71 0.71 0.72 0.66 0.66 0.67
>>>>>>> 0.72 0.70 0.71 0.72 0.71 0.69 0.72 0.72 0.71 0.72 0.72 0.69 0.71 0.74
>>>>>>> 0.73 0.69 0.72 0.72 0.76 0.76 0.79 0.73 0.75 0.74 0.75 0.75 0.71 0.74
>>>>>>> 0.67 0.72 0.65 0.72 0.65 0.69 0.69 0.65 0.68 0.64 0.72 0.67 0.67 0.68
>>>>>>> 0.69 0.65 0.73 0.67 0.71 0.69 0.73 0.72 0.76 0.74 0.72 0.66 0.68 0.69
>>>>>>> 0.69 0.68 0.68 0.70 0.73 0.70 0.73 0.78 0.74 0.73 0.75 0.74 0.72 0.74
>>>>>>> 0.63 0.66 0.68 0.74 0.72 0.74 0.79 0.74 0.74 0.76 0.79 0.79 0.74 0.76
>>>>>>> 0.70 0.75 0.72 0.78 0.74 0.78 0.76 0.80 0.76 0.79 0.77 0.76 0.76 0.75
>>>>>>> 0.73 0.80 0.78 0.81 0.78 0.84 0.76 0.79 0.77 0.79 0.76 0.83 0.77 0.79
>>>>>>> 0.77 0.84 0.76 0.80 0.77 0.81 0.72 0.79 0.74 0.80 0.77 0.83 0.81 0.82
>>>>>>> 0.76 0.81 0.75 0.78 0.74 0.75 0.71 0.75 0.73 0.77 0.77 0.80 0.77 0.80
>>>>>>> 0.75 0.73 0.77 0.72 0.76 0.72 0.76 0.72 0.72 0.69 0.66 0.68 0.65 0.68
>>>>>>> 0.64 0.70 0.62 0.70 0.62 0.69 0.67 0.74 0.75 0.74
>>>>>>> ++ Max displacement in automask = 0.84 (mm) at sub-brick 145
>>>>>>> ++ Wrote dataset to disk in 006/tmp.mc-afni2.2758/outvol.nii.gz
>>>>>>> #@# --------------------------------
>>>>>>>
>>>>>> /Users/maryam/mri-space/studies/PDM1/unpackdata/110419_xu_PDM1_02_PDM/bold
>>>>>>> mri_convert 006/tmp.mc-afni2.2758/outvol.nii.gz 006/fmc.nii --in_like
>>>>>>> 005/f.nii
>>>>>>> mri_convert 006/tmp.mc-afni2.2758/outvol.nii.gz 006/fmc.nii --in_like
>>>>>>> 005/f.nii
>>>>>>> reading info from 005/f.nii...
>>>>>>> $Id: mri_convert.c,v 1.146.2.5 2009/04/08 18:40:23 nicks Exp $
>>>>>>> reading from 006/tmp.mc-afni2.2758/outvol.nii.gz...
>>>>>>> TR=2000.00, TE=0.00, TI=0.00, flip angle=0.00
>>>>>>> i_ras = (-1, -0.000171665, -3.15037e-05)
>>>>>>> j_ras = (0.000174532, -0.983572, -0.180519)
>>>>>>> k_ras = (-2.07852e-18, -0.180519, 0.983572)
>>>>>>> writing to 006/fmc.nii...
>>>>>>> ... cleaning up ....
>>>>>>> Sun Apr 24 20:43:59 EDT 2011
>>>>>>> mc-afni2 done
>>>>>>> INFO: Making external regressor from mc params
>>>>>>> mcparams2extreg -mcfile 006/fmc.mcdat -northog 6 -extreg 006/mcextreg
>>>>>>> Logfile is 006/mcparams2extreg.log
>>>>>>> ----------- Matlab file --------------
>>>>>>>    mcfile = '006/fmc.mcdat';
>>>>>>>    extreg = '006/mcextreg';
>>>>>>>    nkeep     = [];
>>>>>>>    northog   = [6];
>>>>>>>    pctorthog = [];
>>>>>>>    monly     = 0;
>>>>>>>
>>>>>>>    mc = textread(mcfile);
>>>>>>>    mc = mc(:,2:7);
>>>>>>>    ntrs = size(mc,1);
>>>>>>>    if(ntrs<  6)
>>>>>>>      fprintf('ERROR: ntrs = %d<  6\n',ntrs);
>>>>>>>      if(~monly)
>>>>>>>        fprintf('Quiting matlab\n');
>>>>>>>        quit;
>>>>>>>        fprintf('should not be here\n');
>>>>>>>      end
>>>>>>>    end
>>>>>>>
>>>>>>>    if(~isempty(nkeep))
>>>>>>>      x = mc(:,1:nkeep);
>>>>>>>    elseif(~isempty(northog))
>>>>>>>      [u s v] = svd(mc);
>>>>>>>      ds = diag(s);
>>>>>>>      pct = 100*cumsum(ds)/sum(ds);
>>>>>>>      x = u(:,1:northog);
>>>>>>>      nkeep = northog;
>>>>>>>      fprintf('INFO: northog = %d, pct = %g\n',northog,pct(nkeep));
>>>>>>>    else
>>>>>>>      [u s v] = svd(mc);
>>>>>>>      ds = diag(s);
>>>>>>>      pct = 100*cumsum(ds)/sum(ds);
>>>>>>>      nkeep = min(find(pct>  pctorthog));
>>>>>>>      x = u(:,1:nkeep);
>>>>>>>      fprintf('INFO: pctorthog = %g, nkeep = %d\n',pctorthog,nkeep);
>>>>>>>    end
>>>>>>>
>>>>>>>    x2 = zeros(1,1,nkeep,ntrs);
>>>>>>>    x2(1,1,:,:) = x'; %'
>>>>>>>    %fmri_svbvolume(x2,extreg);
>>>>>>>
>>>>>>>    mri.vol = permute(x2,[1 3 2 4]);
>>>>>>> mri.tr<http://mri.tr>  = 0;
>>>>>>>    mri.flip_angle = 0;
>>>>>>>    mri.te = 0;
>>>>>>>    mri.ti = 0;
>>>>>>>    mri.vox2ras0 = eye(4);
>>>>>>>    mri.xsize = 1;
>>>>>>>    mri.ysize = 1;
>>>>>>>    mri.zsize = 1;
>>>>>>>    mri.volres = [1 1 1];
>>>>>>>    mri.volsize = [size(mri.vol,1) size(mri.vol,2) size(mri.vol,3)];
>>>>>>>    fname = sprintf('%s.bhdr',extreg);
>>>>>>>    MRIwrite(mri,fname);
>>>>>>>
>>>>>>> quit;
>>>>>>> -----------------------------------
>>>>>>> ------------------------------------------
>>>>>>> ------- matlab output --------------------
>>>>>>> Warning: Unable to open display 'iconic'.  You will not be able to
>>>>>>> display graphics on the screen.
>>>>>>>
>>>>>>> <  M A T L A B (R)>
>>>>>>>                    Copyright 1984-2009 The MathWorks, Inc.
>>>>>>>                   Version 7.9.0.529 (R2009b) 64-bit (maci64)
>>>>>>>                                August 12, 2009
>>>>>>>    To get started, type one of these: helpwin, helpdesk, or demo.
>>>>>>>    For product information, visit www.mathworks.com
>>>>>>> <http://www.mathworks.com>.
>>>>>>>>>>>>>>>>>>>>>>> ??? Error using ==>  textread at 167
>>>>>>> File not found.
>>>>>>>>> ??? Undefined variable mc.
>>>>>>>>> ??? Undefined function or variable 'mc'.
>>>>>>>>> ??? Undefined function or variable 'ntrs'.
>>>>>>>>>>> ??? Undefined function or variable 'mc'.
>>>>>>>>>>> ??? Undefined function or variable 'ntrs'.
>>>>>>>>> ??? Undefined function or variable 'x'.
>>>>>>>>>>>>> ??? Undefined function or variable 'x2'.
>>>>>>>>>>>>>>>>>>>>>>>>>>> ??? Reference to non-existent field
>>>>>> 'vol'.
>>>>>>>>>>> ??? Reference to non-existent field 'vol'.
>>>>>>> Error in ==>  MRIwrite at 70
>>>>>>>    bmri.voldim = [size(mri.vol,1) size(mri.vol,2) size(mri.vol,3)];
>>>>>>>>>>> ------------------------------------------
>>>>>>> ERROR: output not created
>>>>>>> ERROR: mc-sess failed
>>>>>>>
>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
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