Thanks for your help. I had problem in the first option. thanks Karo Tim Behrens <[log in to unmask]> wrote: I guess this means one of two things: 1) either your bvecs or your bvals do not end in a carriage return (new line). This is a common problem - we should put it on the FAQ page - sorry. 2) your brain mask is not binary (1,0) cheers T On 7 May 2007, at 10:01, karo zargar wrote: I did dtifit I recived the 9 expected outputs, but when I tried to view them via fsl view, the results seems to be zero. I am sending you the FA file. thanks Karo --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check out new cars at Yahoo! Autos. <dti_FA[1].nii.gz> --------------------------------- Ahhh...imagining that irresistible "new car" smell? Check outnew cars at Yahoo! Autos.