Hi Yasemin - If you upload all the tracula output files for me here, I'll take a look:
https://gate.nmr.mgh.harvard.edu/filedrop2/

Please include all the output directories for this one subject in one zip file. Thanks!

Anastasia.

From: freesurfer-bounces@nmr.mgh.harvard.edu <freesurfer-bounces@nmr.mgh.harvard.edu> on behalf of Hasimoglu, Yasemin <YHASIMOGLU@mgh.harvard.edu>
Sent: Thursday, October 29, 2020 11:47 AM
To: Freesurfer support list <freesurfer@nmr.mgh.harvard.edu>
Subject: [Freesurfer] trac-preproc error
 
Hi,

I'm running Tracula on a longitudinal dataset and it's failing at the preproc stage for one subject with the following message:

INFO: Distances between consecutive points in test subject's space are 16 13 12 14
WARN: Could not find satisfactory control point fit - try 4967
Finding center streamline
INFO: Step is 3 voxels
WARN: Turning off deviation check for center streamline
INFO: Step is 3 voxels
WARN: Turning off FA check for center streamline
INFO: Step is 3 voxels
WARN: Turning off overlap check for center streamline
INFO: Step is 3 voxels
WARN: All checks already off. Exiting.
Selecting 5 points on center streamline
ERROR: Selected streamline has fewer than 5 points
Linux zorii.nmr.mgh.harvard.edu 3.10.0-1062.4.3.el7.x86_64 #1 SMP Wed Nov 13 23:58:53 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

trac-preproc exited with ERRORS at Wed Oct 28 04:11:51 EDT 2020

It looks like the problem is with one specific pathway. I checked the brainmask and the inter and intra-subject registrations and they all look fine to me, so I'm not sure what else to check. The trac-all.log file is quite large, I attempted to attach it in this email several times, but it always gets rejected, so I'm not attaching it for now. I would greatly appreciate any advice!

Best,
Yasemin