dnal: 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/dnal - from package: wise2

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

On Debian possible default full paths are:

/usr/bin/dnal - from package: wise

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

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