dgscat: 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/dgscat - from package: ptscotch

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

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