modelicat: 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/modelicat - from package: scilab-full-bin

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

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