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I have just solved my own problem.  It turns out that this error  
happens when trying to run FAST using images that are located  
remotely on our backup server.  When I moved the images to my own  
hard-drive, FAST no longer returns this error.

On Jul 5, 2007, at 11:41 AM, Lynne Gauthier wrote:

> Yes, I am running 3.3.  I recently downloaded FSL again when I  
> couldn't get the images to work.  The upload reference number is  
> 505337. Thank you.  I really appreciate the help.
>
> -Lynne
>
>
> On Jul 5, 2007, at 12:15 AM, Steve Smith wrote:
>
>> I would think this should be ok. Are you running the current  
>> version of FSL (3.3)?
>> Feel free to upload the image and we can take a look.
>>
>> Please upload the files in a single compressed tarfile to
>> http://www.fmrib.ox.ac.uk/cgi-bin/upload.cgi
>> and then email me the upload ID.
>>
>> Cheers, Steve.
>>
>>
>>
>> On 4 Jul 2007, at 23:33, Lynne Gauthier wrote:
>>
>>> Dear FSLers,
>>>
>>> I am having some trouble running FAST.  It instantly gives me the  
>>> following error:
>>>
>>> Unknown file format!
>>> Finished
>>>
>>> I am able to run BET and SIENA on the same file.  Any ideas why  
>>> FAST doesn't like it? Suggestions
>>> would be greatly appreciated.  Here's the information about the  
>>> file from avwhd:
>>>
>>> sizeof_hdr     348
>>> data_type      INT16
>>> dim0           3
>>> dim1           256
>>> dim2           256
>>> dim3           150
>>> dim4           1
>>> dim5           1
>>> dim6           1
>>> dim7           1
>>> vox_units      mm
>>> time_units     Unknown
>>> datatype       4
>>> nbyper         2
>>> bitpix         16
>>> pixdim0        0.0000000000
>>> pixdim1        0.9375000000
>>> pixdim2        0.9375000000
>>> pixdim3        1.0000000000
>>> pixdim4        1.0000000000
>>> pixdim5        1.0000000000
>>> pixdim6        1.0000000000
>>> pixdim7        1.0000000000
>>> vox_offset     0
>>> cal_max        0.0000
>>> cal_min        0.0000
>>> scl_slope      1.000000
>>> scl_inter      0.000000
>>> phase_dim      1
>>> freq_dim       2
>>> slice_dim      3
>>> slice_name     Unknown
>>> slice_code     0
>>> slice_start    0
>>> slice_end      149
>>> slice_duration 0.000000
>>> time_offset    0.000000
>>> intent         Unknown
>>> intent_code    0
>>> intent_name
>>> intent_p1      0.000000
>>> intent_p2      0.000000
>>> intent_p3      0.000000
>>> qform_name     Scanner Anat
>>> qform_code     1
>>> qto_xyz:1      -0.937500  0.000000  -0.000000  120.116997
>>> qto_xyz:2      0.000000  0.937500  -0.000000  -104.248993
>>> qto_xyz:3      0.000000  0.000000  1.000000  -67.475899
>>> qto_xyz:4      0.000000  0.000000  0.000000  1.000000
>>> qform_xorient  Right-to-Left
>>> qform_yorient  Posterior-to-Anterior
>>> qform_zorient  Inferior-to-Superior
>>> sform_name     Unknown
>>> sform_code     0
>>> sto_xyz:1      0.000000  0.000000  0.000000  0.000000
>>> sto_xyz:2      0.000000  0.000000  0.000000  0.000000
>>> sto_xyz:3      0.000000  0.000000  0.000000  0.000000
>>> sto_xyz:4      0.000000  0.000000  0.000000  0.000000
>>> sform_xorient  Unknown
>>> sform_yorient  Unknown
>>> sform_zorient  Unknown
>>> file_type      NIFTI-1
>>> file_code      2
>>> descrip        AX T1 3D FSPGR
>>> aux_file
>>>
>>> Thanks!
>>
>>
>> --------------------------------------------------------------------- 
>> ------
>> Stephen M. Smith, Professor of Biomedical Engineering
>> Associate Director,  Oxford University FMRIB Centre
>>
>> FMRIB, JR Hospital, Headington, Oxford  OX3 9DU, UK
>> +44 (0) 1865 222726  (fax 222717)
>> [log in to unmask]    http://www.fmrib.ox.ac.uk/~steve
>> --------------------------------------------------------------------- 
>> ------
>
> Lynne Gauthier
> Graduate Research Associate
> Neuroimaging Lab
> CI Therapy Research Group
> University of Alabama - Birmingham
> 857-998-7785
> [log in to unmask]
>
>
>
>

Lynne Gauthier
Graduate Research Associate
Neuroimaging Lab
CI Therapy Research Group
University of Alabama - Birmingham
857-998-7785
[log in to unmask]