Hi @llenzi ,
I would say the software required OTU file is actually generated from the taxa barplot (p-level 6).
qiime taxa barplot
--i-table table.qza
--i-taxonomy taxonomy.qza
--m-metadata-file metadata.tsv
--o-visualization taxa-bar-plots.qzv
I tried to generate a filtered phylogenetic tree using this link (Filter OTU table to generate a smaller phylogenetic tree file - #5 by anranzhilv), but I still get the same error message in that online software. "Tree tip labels do not match feature names in the OTU/taxonomic tables!"
Any guidance would be appreciated!
Thanks!