gensprep: 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/sbin/gensprep - from package: icu

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

On Debian possible default full paths are:

/usr/sbin/gensprep - from package: icu-devtools

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

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