Hello, I am using selxavg3-sess in FreeSurfer to do retinotopic mapping. I've installed FSL 5.0. I'm using FreeSurfer v5.3.0 on a 32-bit Debian 8.1.0 in a VirtualBox with a 64-bit Windows 8 host. When I called selxavg3-sess, there's this error message: # ---------- Using FSL's BET to Extract Brain------------------ # /media/sf_fMRI_data/scans/33333/func/retino/preprocessed/Retinotopy/33333/Retinotopy bet.fsl /tmp/mkbrainmask_7812/in.nii /tmp/mkbrainmask_7812/brain -m -f 0.1 /usr/share/fsl/5.0/bin/bet2: error while loading shared libraries: libfslvtkio.so: cannot open shared object file: No such file or directory mri_binarize --i /tmp/mkbrainmask_7812/brain_mask.nii --min .01 --o /tmp/mkbrainmask_7812/brain_mask.nii niiRead(): error opening file /tmp/mkbrainmask_7812/brain_mask.nii It seems that there's a problem running bet2. I tried typing bet2 in the terminal and got this error message: bet2: error while loading shared libraries: libfslvtkio.so: cannot open shared object file: No such file or directory I looked through some FSL/FreeSurfer forum messages and it seems to be a problem related to $FSLDIR. My $FSLDIR has been set to (I got this when I echo $FSLDIR): /usr/share/fsl/5.0 Is this correct? Or do I need to set some other variables? Or the problem is actually something else? I also found some message about a varibale called LD_LIBRARY_PATH, which I don't know is relevant or not... Any help would be greatly appreciated! Thanks, Alan -- Alan L.F. LEE, PhD <http://sites.google.com/site/alanlflee/> sites.google.com/site/alanlflee