scinotes: 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/scinotes - from package: scilab

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

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