Hi Daniel,

I may see what you mean - thanks for including your DTIStudio version info :)
Using a somewhat newer version of JIST, I can visualize ALL fibers in DTIStudio (see attached).
However, I can't seem to select fibers using their ROI tools (see attached "_oops").
Is this what you observe??

The newer DTIStudio releases must have changed how they deal with these ROIs - an older version
(2.4) works fine using these JIST fibers.

It may take some time to figure out how to make our fibers play nicely with newer DTIS...