I see, you're using the old version of tracula (from freesurfer 5.1). In that version, you had to define the number of low-b images in the configuration file. I strongly recommend updating to freesurfer 5.3. A lot of things have improved in tracula since then.
Also, in the future please attach any log files as separate attachments instead of pasting them into the body of your email - this causes the body of the email to exceed the limit allowable on the list.
Thanks, a.y