PythonNWSSleighWorker: 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/PythonNWSSleighWorker - from package: python-nwsclient

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

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