cipux_task_client: 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 Debian possible default full paths are:

/usr/bin/cipux_task_client - from package: cipux-task-tools

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

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