blastcl3: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/bin/blastcl3 - from package: blast2

You may install the required package with command apt-get install {package}

Error in other languages:
blastcl3: bevel nie gevind nie
blastcl3: comandă negăsită
blastcl3: comando não encontrado
blastcl3: commande introuvable
blastcl3: command not found
blastcl3: käsku ei ole
blastcl3: không tìm thấy lệnh
blastcl3: komanda nerasta
blastcl3: Kommando nicht gefunden.
blastcl3: kommandot finns inte
blastcl3: komut yok
blastcl3: nie znaleziono polecenia
blastcl3: níor aimsíodh an t-ordú
blastcl3: no se encontró la orden
blastcl3: no s'ha trobat l'ordre
blastcl3: opdracht niet gevonden
blastcl3: parancs nem található
blastcl3: perintah tidak ditemukan
blastcl3: príkaz nenájdený
blastcl3: příkaz nenalezen
blastcl3: команда не найдена
blastcl3: командата не е открита
blastcl3: 命令找不到
blastcl3: コマンドが見つかりません