scotch_amk_fft2: 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 CentOS possible default full paths are:

/usr/bin/scotch_amk_fft2 - from package: scotch

You may install the required package with command yum install {package}

Error in other languages:
scotch_amk_fft2: bevel nie gevind nie
scotch_amk_fft2: comandă negăsită
scotch_amk_fft2: comando não encontrado
scotch_amk_fft2: commande introuvable
scotch_amk_fft2: command not found
scotch_amk_fft2: käsku ei ole
scotch_amk_fft2: không tìm thấy lệnh
scotch_amk_fft2: komanda nerasta
scotch_amk_fft2: Kommando nicht gefunden.
scotch_amk_fft2: kommandot finns inte
scotch_amk_fft2: komut yok
scotch_amk_fft2: nie znaleziono polecenia
scotch_amk_fft2: níor aimsíodh an t-ordú
scotch_amk_fft2: no se encontró la orden
scotch_amk_fft2: no s'ha trobat l'ordre
scotch_amk_fft2: opdracht niet gevonden
scotch_amk_fft2: parancs nem található
scotch_amk_fft2: perintah tidak ditemukan
scotch_amk_fft2: príkaz nenájdený
scotch_amk_fft2: příkaz nenalezen
scotch_amk_fft2: команда не найдена
scotch_amk_fft2: командата не е открита
scotch_amk_fft2: 命令找不到
scotch_amk_fft2: コマンドが見つかりません