Problem with Biom add metadata

Sir,I used the measure you shared,but it didnt work.

biom add-metadata -i exported-feature-table/feature-table.biom -o table-with-taxonomy.biom --observation-metadata-fp biom-taxonomy.tsv --sc-separated taxonomy
biom convert -i table-with-taxonomy.biom
-o table-with-taxonomy.txt
--to-tsv



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