snmpttconvert: 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/snmpttconvert - from package: snmptt

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

On Debian possible default full paths are:

/usr/sbin/snmpttconvert - from package: snmptt

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

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