Hi - this sounds like you didn;t have a valid input image. What was the complete command line call? What happens if you type avwinfo <inputimage> avwstats <inputimage> -r -R Cheers. On Thu, 21 Oct 2004, Ray Norbury wrote: > Hi, > > I tried to run bet in the lastest release of fsl and I get the following > error message: > > Error: failed to open file <my_filename> > Error:: FslCloneHeader: Null pointer passed for FSLIO > Finished > > Could anyone suggest how to fix this? > > cheers, > > ray > -- Stephen M. Smith DPhil Associate Director, FMRIB and Analysis Research Coordinator Oxford University Centre for Functional MRI of the Brain John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve