When you run that bet command line outside of trac-all, does it give you 
the same error?

On Wed, 15 Feb 2012, Chris Watson wrote:

> Here's output from mri_info:
> [freesurfer@occipital dmri]$ mri_info lowb.nii.gz
> Volume information for lowb.nii.gz
>          type: nii
>   dimensions: 96 x 96 x 56
>  voxel sizes: 2.5000, 2.5000, 2.5000
>         type: FLOAT (3)
>           fov: 240.000
>           dof: 0
>        xstart: -120.0, xend: 120.0
>        ystart: -120.0, yend: 120.0
>        zstart: -70.0, zend: 70.0
>           TR: 1000.00 msec, TE: 0.00 msec, TI: 0.00 msec, flip angle: 0.00 
> degrees
>       nframes: 1
>       PhEncDir: UNKNOWN
> ras xform present
>   xform info: x_r =  -1.0000, y_r =   0.0000, z_r =   0.0000, c_r = 
> 0.9450
>             :  x_a =   0.0000, y_a =   1.0000, z_a =   0.0000, c_a = 
> 31.8560
>             :  x_s =   0.0000, y_s =   0.0000, z_s =   1.0000, c_s = 
> 25.3936
> Orientation   : LAS
> Primary Slice Direction: axial
>
> voxel to ras transform:
>               -2.5000   0.0000   0.0000   120.9450
>                0.0000   2.5000   0.0000   -88.1440
>                0.0000   0.0000   2.5000   -44.6064
>                0.0000   0.0000   0.0000     1.0000
>
> voxel-to-ras determinant -15.625
>
> ras to voxel transform:
>               -0.4000   0.0000   0.0000    48.3780
>               -0.0000   0.4000  -0.0000    35.2576
>               -0.0000  -0.0000   0.4000    17.8426
>                0.0000   0.0000   0.0000     1.0000
>
> It looks normal in fslview/freeview.
> Chris
>
> Anastasia Yendiki wrote:
>>  Hey Chris - That is strange. The FSLOUTPUTTYPE would've been my first
>>  guess, too. Does this lowb.nii.gz actually exist? Anything looks strange
>>  when you run mri_info/freeview/fslview on it?
>>
>>  a.y
>>
>>  On Wed, 15 Feb 2012, Chris Watson wrote:
>>
>> 
>> >  Hello, in running trac-all -prep, I get an error saying that it can't
>> >  open "lowb.nii.gz.hdr":
>> > 
>> >  fslroi
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/dwi.nii.gz
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/lowb.nii.gz
>> >  0 1
>> >  fslmaths
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/lowb.nii.gz
>> >  -Tmean
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/lowb.nii.gz
>> >  bet
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/lowb.nii.gz
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/lowb_brain.nii.gz
>> >  -m -f 0.3
>> >  Can't open
>> >  
>> > /raid2/fmri8/fontan/volumetric/freesurfer/1.5T/cardiac/foo_b/dmri/lowb.nii.gz.hdr
>> >  Linux occipital.tch.harvard.edu 2.6.18-274.17.1.el5 #1 SMP Tue Jan 10
>> >  17:25:58 EST 2012 x86_64 x86_64 x86_64 GNU/Linux
>> > 
>> >  trac-preproc exited with ERRORS at Wed Feb 15 15:15:52 EST 2012
>> > 
>> >  The variable FSLOUTPUTTYPE is set to NIFTI_GZ. I don't encounter this
>> >  problem with other subjects that I am processing. Any thoughts?
>> > 
>> >  Thanks,
>> >  Chris
>> > 
>> >  _______________________________________________
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>> > 
>> > 
>> > 
>> >
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