Uploading FreeSurfer-processed volumes

Hello,

First of all, I wanted to thank you for creating such an efficient and elegant software!

I have been trying to upload to the latest CONN distribution (v.16.a) a few subjects that I have processed with FreeSurfer to analyze their resting-state fMRIs. However, I have been running into an issue that I cannot seem to solve:
After I upload the "brainmask.mgz" volume under the "Session-specific structural data," I get a message that tells me that the Freesurfer aseg.mgz segmentation files were found and whether I would like to import them. After I click yes and "OK" on the "1 files assigned to 1 subjects/sessions" message, an error message appears saying:

ERROR DESCRIPTION:

Undefined function 'isnan' for input arguments of type 'struct'.
Error in conn_menu (line 527)
title(isnan(title))=0;
Error in conn (line 1525)
conn_menu('updateimage',CONN_h.menus.m_setup_00{5},vol);
Error in conn_filesearchtool (line 150)
if length(h.callback)>1, feval(h.callback{1},h.callback{2:end},names); else, feval(h.callback{1},names); end
CONN v.16.a
SPM12 + DEM FieldMap MEEGtools
Matlab v.2014b

I was wondering whether you had any feedback on how to solve this. I apologize if it is a trivial issue and/or has been addressed before!

Thank you,
Panos