Error in Check.entry.pls(X, Y, ncomp, keepX, keepY, mode = mode, scale = scale, : Unmapped Y contains samples with no associated class. May be caused by NAs in input Y vector

hi @stepra,
Have you tried with a Y outcome on the 0 to 100 scale instead? The Y in using the MAE should not be a factor.

You can send me you RData if that does not work at kimanh.lecao[at]unimelb.edu.au with a fully reproducible code.

Kim-Anh