Hi list, I'm using FS-FAST. For a subject I have the error reported below after fcseed-sess -s subj -cfg vcsf.config.The segmentation of the structural image is fine. $Id: mri_glmfit.c,v 1.196.2.8 2012/11/01 18:51:41 greve Exp $ cwd /Applications/freesurfer/subjects/fMRI cmdline mri_glmfit --y /Applications/freesurfer/subjects/fMRI/subj/rest/001/fmcpr.nii.gz --mask /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/mask.nii.gz --qa --glmdir /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/glm --pca --no-est-fwhm sysname Darwin hostname iMac-di-Stefano.local machine x86_64 user Stefano FixVertexAreaFlag = 1 UseMaskWithSmoothing 1 OneSampleGroupMean 0 y /Applications/freesurfer/subjects/fMRI/subj/rest/001/fmcpr.nii.gz logyflag 0 usedti 0 mask /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/mask.nii.gz maskinv 0 glmdir /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/glm IllCondOK 0 ReScaleX 1 DoFFx 0 Creating output directory /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/glm Loading y from /Applications/freesurfer/subjects/fMRI/subj/rest/001/fmcpr.nii.gz Saving design matrix to /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/glm/Xg.dat Normalized matrix condition is 61.5872 Matrix condition is 1e+08 Pruning voxels by thr: 0.000000 Found 0 voxels in mask Saving mask to /Applications/freesurfer/subjects/fMRI/subj/rest/001/tmp.fcseed-sess.44153/glm/mask.mgh search space = 0.000000 DOF = 297 Starting fit and test Fit completed in 0.00075 minutes Computing temporal AR1 Writing results Computing FSNR mean maxvox sig=0 F=0 at index 0 0 0 seed=1446346479 linear maxvox sig=0 F=0 at index 0 0 0 seed=1446346479 quad maxvox sig=0 F=0 at index 0 0 0 seed=1446346479 Computing PCA (300) ERROR: no voxels in mask