Hello,
I seem to be getting this error whenever I try to perform MBLL conversion. What can be possibly wrong?

Hello,
I seem to be getting this error whenever I try to perform MBLL conversion. What can be possibly wrong?

The dataset from FNIRS data import - #12 by Jimmyuba1 is already concentration changes (Hbo, HbR, HbT)
Thank you very much for your help.
It means I can move on to performing other operation?
yes.