When I try to run fast it gives me the following errors. Any help is appricated. Thanks Chris bitina{cieplycj}: fast mh4spgr_ed.img FAST - FMRIB's Automated Segmentation Tool Version 3.53 Image: /tmp/fsl_a6aOgd_mh4037spgr_ed T1-weighted image Imagesize : 256 x 256 x 124 Pixelsize : 0.937 x 0.937 x 1.5 Initial K-means segmentation... 8 main iterations ... Segmentation done successfully! Calculation time 519 seconds! Write segmentation image /tmp/fsl_a6aOgd.fastout/QQQQQ_seg.hdr Successfully! Class: CSF tissue 1 tissue 2 brain percentage Volumes: 298744.5 466380.3 506404.0 0.765051 ** ERROR: nifti_image_read(/tmp/fsl_a6aOgd.fastout/QQQQQ_seg.hdrn/tmp/fsl_a6aOgd.fastout/ QQQQQ_seg): can't open header file ** ERROR: nifti_image_open(/tmp/fsl_a6aOgd.fastout/QQQQQ_seg.hdrn/tmp/fsl_a6aOgd.fastout/ QQQQQ_seg): bad header info Error: failed to open file /tmp/fsl_a6aOgd.fastout/QQQQQ_seg.hdrn/tmp/fsl_a6aOgd.fastout/ QQQQQ_seg Error:: FslGetIntensityScaling: Null pointer passed for FSLIO