cflow: 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/cflow - from package: cflow

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

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