Hi Skyler - Are you using freesurfer 5.1 or 5.3?

Most likely this issue is due to poor registration, either from the individual DWI to the individual T1, or from the individual T1 to the template space. Or it could be that there is a problem with the aparc+aseg.

a.y

On Mon, 2 Dec 2013, Skyler Gabriel Shollenbarger wrote:

Hi all,

I've been running DTI using tracula (fs version 5) for over 1 week on 2 subjects. It appears that it is having difficulty finding satisfactory control point fit and has attempted over 1600 tries. Any help is greatly appreciated. See error below:

INFO: Distances between consecutive points are 25 24 25 26 WARN: Could not find satisfactory control point fit - try 1665 Finding center streamline INFO: Step is 4 voxels WARN: Turning off FA check for center streamline INFO: Step is 4 voxels WARN: Turning off deviation check for center streamline INFO: Step is 4 voxels INFO: Length of center streamline is 96 voxels Selecting 5 points on center streamline INFO: Step is 4 voxels WARN: Defaulting to equidistant control points INFO: Selected control points are  108 193 84  112 173 72  98 153 75  74 157 75  74 184 86 INFO: Distances between consecutive points are 24 25 24 29 WARN: Could not find satisfactory control point fit - try 1666 Finding center streamline INFO: Step is 4 voxels WARN: Turning off FA check for center streamline INFO: Step is 4 voxels WARN: Turning off deviation check for center streamline INFO: Step is 4 voxels

Best, Skyler