Hi This looks like a memory problem, have you monitored mem consumption? If it is then running this on a 64bit machine with a 64bit OS might work. Maybe increasing swap space is already good enough hth Christian On 24 Jun 2008, at 10:36, Hege Erdal wrote: > Hi, > I've been getting this message when I've tried to use mfast on t1 > and t2 > pictures to extract white, grey and CFR. I'm using well-aligned > pictures > with same dimensions, or so they seem. I'm doing this on FC-8, the > 32-bit > version (but I think the processor is a 64-bit, if that makes a > difference). > > It works on some pictures, but not on all(cause of this errormessage). > Anybody know what it means? And most important, how to fix it? > > /usr/local/fsl/bin/mfast -s 2 -c 3 -od > /media/LaCie/Forsøk2/Dykkar_Bse_nei/Dykkar_Bse_brain > /media/LaCie/Forsøk2/Dykkar_Bse_nei/Dykkar_Bse_brain > /media/LaCie/Forsøk2/Dykkar_Bse_nei/Dykkar_Bse2_brain.nii.gz > > MFAST - Multispectral FAST Version 3.53 > > Channel 0: /tmp/fsl_nF1Bk2_Dykkar_Bse_brain > Channel 1: /tmp/fsl_nF1Bk2_Dykkar_Bse2_brain > Imagesize : 256 x 256 x 19 > Pixelsize : 0.898438 x 0.898438 x 6.64999 > > Slice is too thick, 2D segmentation will be performed! > initial segmentation by KMeans.... > 4 main iterations ... > /usr/local/fsl/bin/mfast: line 44: 9311 Segmentation fault $ > {fastcom}_exe $args > Finished > > Regards > Hege