I would like to ask a simple question. I successfully set up MATLAB,
and NIRS-SPM following the instructions on your website (
https://www.nitrc.org/). I am using fNIRS by Shimazu, LABNIRS,
and using FASTRACK for channel position.

According to the manual, first I set up [Spatial Registration with 3D
Digitizer] and then [Reference position in REAL space] and [Optode and
Channel position in REAL space] input orgin and other data, repectively.
After setting up, when I entered the Registration, the error message "
nfri_mni_estimation function does not exist. Please add the path of NFRI
function folders" came up.
Could you give me some advice on this issue?

Regards,
Jaehoon Seol