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BLAST error: Too many positional arguments


blastn –db nt –query nt.fsa –out results.out

Error: Too many positional arguments (1), the offending value


Problem is a copy & past from the BLAST documentation, all dashes ('–') need to be replaced by hand at the command line.

Replace / re-type all '–' with '-'
blastn -db nt -query nt.fsa -out results.out