mclblastline: 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/mclblastline - from package: mcl

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

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