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Hi, it's not clear what this error is referring to. You should view all timepoints of the data being fed into eddy_correct, and also the data output by it, to see if it's clear whether there is a problem here. The output should have all timepoint volumes nicely aligned to each other. Was the input filename itself maybe illegal, for example containing a space? Cheers, Steve. On Wed, 17 Jan 2007 15:13:57 -0000, Shan Shen <[log in to unmask]> wrote: >Hi, everybody, > >I've just started to use FSL to analyze my DTI data. The first step, >eddy current correction gave error messages as follows: > >Errors: processing vol0000.nii.gz > processing vol0001.nii.gz > .... > processing vol00012.nii.gz > >My data has 12 directions and one B0 image. Despite the errors, it does >generate a data.nii.gz file as named before the start. I would like to >know what the errors mean and whether the data.nii.gz file is the >corrected data and still can be used in the next step? > >Many thanks > >Dr Shan Shen > >=========================================================== =============