dpxdic: 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/dpxdic - from package: Canna

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

On Debian possible default full paths are:

/usr/bin/dpxdic - from package: Canna

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

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