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Dear FreeSurfer Developers,

I am attempting to run the longitudinal hippocampal subfields segmentation, using the development version of FreeSurfer. This works perfect for subjects with multiple data time points, but I get the following error for subjects for which I have a single data time point (see attachment for the error log):

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 Global iteration 2

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   ***** Estimating subject-specific atlas *****

Error using kvlGEMSMatlab

/autofs/space/panamint_005/users/iglesias/software/freesurfer/GEMS2/Matlab/kvlMatlabObjectArray.cxx:82:

itk::ERROR: MatlabObjectArray(0x7f8686741c40): Trying to access non-existing object (25)

Error in kvlGetOptimizer (line 11)

Error in SegmentSubfieldsT1Longitudinal (line 1155)

Is it possible to run this longitudinal module on subjects with a single time point? Any thoughts on how to troubleshoot this?

FreeSurfer version: freesurfer-Linux-centos7_x86_64-dev-20180118-d073f7e

Platform: CentOS Linux 7 (Core)

Uname -a: Linux mentat003.dccn.nl 3.10.0-693.17.1.el7.x86_64 #1 SMP Thu Jan 25 20:13:58 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

Thanks for your help!

Saskia