I am trying to use DIABLO to analyze 16S rRNA data and metabolomics data from samples that were all collected from one time point. When I define outcome Y, it does not recognize the column I specify. Thus when I summarize it, I get length 0, class: null, mode: null. Then when I run block.splsda on my data I get "error in [<- (tmp, classification == groups[j], j, value = 1): subscript out of bounds. I am unsure on how to resolve this error.