dtplite: 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/dtplite - from package: tcllib

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

On Debian possible default full paths are:

/usr/bin/dtplite - from package: tcllib

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

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