Hi,
The "fieldmap" here is an image. So there needs to be a file
that contains the fieldmap image. The error you are getting
is a result of it not being able to find any image called
"fieldmap" (plus any extensions, like .hdr, etc) in the
current directory.
If you run the command in a directory that contains an
appropriate image, or give the option a path name to the
image then it should work.
All the best,
Mark
On 19 Nov 2004, at 19:55, Amrapali Arshanapalli wrote:
> Hi all,
>
> I am extremely new to FSL and was trying to run the Evaluation and
> Example Data Suite available in FSL 3.2. I am following
> http://www.fmrib.ox.ac.uk/fsl/feeds/doc/index.html
>
> I have an error when I run FUGUE frm the command line. According to
> the documentation, I typed :
> prelude -c fieldmap -u ~/unwrapped_phase (this is the path to the
> unwrapped_phase)
>
> I saw that fieldmap is not an option under 'prelude' and I dont know
> what fieldmap is...and so I just typed the above command line exactly
> ..the error was :
>
> ** ERROR: nifti_image_read(fieldmap): can't open header file
> ** ERROR: nifti_image_open(fieldmap): bad header info
> Error: failed to open file fieldmap
> Cannot open volume fieldmap for reading!
>
> I would appreciate your help --
>
> Thanks,
> Amrapali
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