vv_treemap: 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/vv_treemap - from package: viva

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

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