pycamltop: 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/pycamltop - from package: libpycaml-ocaml-dev

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

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