ivcat: 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/ivcat - from package: inventor-clients

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

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