Hi Alex Are you running probtrackx from the command line? In that case, you need to add the --opd option in order to get the output connectivity map. Cheer, Saad. On 20 Apr 2009, at 20:38, Alex Baria wrote: > Hi, > > I'm new to FSL and attempting to do some DTI analysis. When I run the > probtrackx tool for a single mask I understand I am supposed to get > a couple > log files and an image file of the connectivity of the seed mask. > However, > when I run this, the only output I am getting is the probtrackx.log > file. > There is no error message or anything. It just runs for a second > and that's > all there is. I have also tried doing the same thing with only a > single > voxel and I continue to get no image file. Can anyone please help me? > > Thanks, > Alex > Saad Jbabdi Oxford University FMRIB Centre JR Hospital, Headington, OX3 9DU, UK +44 (0) 1865 222545 (fax 717) www.fmrib.ox.ac.uk/~saad