Tkmedit and tksurfer both return "Bus error" for me. I can even have a glimpse of the surfaces before tksurfer collapses on me. I checked the archive

http://www.mail-archive.com/freesurfer@nmr.mgh.harvard.edu/msg19422.html

I don't think disc space is an issue for me since the freesurfer is installed and run on a portable hard drive with >600GB of free space.

Thank you very much for your help in advance!

Sincerely,
Ye