i learning handbook with input this code is show me error
blastdbcmd -db db/Betacoronavirus -entry all -outfmt "%a %T %t"
BLAST Database error: Error: Not a valid version 4 database.
What should I do, I can't google the answer
1 answer
It means that you are using an older version of the blast software but that you already have the newest DB at hand.
the newest blast version work with a new blastDB type (=version 5 ), the older still work with v4 . What you download currently from ncbi is the version 5 DBs (the version 4 is only available in a kind of legacy mode)
solution: get the newest blast software version (or revert the DB to an older version) , Personally I would go for updating the software
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thank u , it work
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