I keep getting errors when following the manual for the "spatial registration of NIRS channel locations" section, specifically the "using 3D digitizer" subsection starting on page 22 of the manual.

When I load the "origin" and "others" files and select "registration" button, then click "ok" in the next window, I continuously get errors:
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Subscript indices must either be real positive integers or logicals.
Error in nfri_mni_estimation_modified>AffineEstimation4 (line 581)
BrainColorMap(Area(j, 6), :) * BCratio;
Error in nfri_mni_estimation_modified>BtnFcnCheck (line 215)
AffineEstimation4(loadedData);
Error while evaluating DestroyedObject Callback.
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As a result, when the image of the brain appears, it is bare. None of the channels, optodes, nor red, green, pink, and white dots appear on the head/cortical surfaces. This stops further analysis of the data.

Additionally, when trying to convert NIRx data into data compatible for NIRS_SPM (pg 8 in manual) what is the purpose because when the code converts the optical density changes into hemodynamic measurements, the new data is saved in a format the nirs spm cannot read.

This code is unchanged, downloaded directly from the NIRS SPM website, so I am not sure why these errors are coming up.

Thank you in advance.  Any tips/advice helps