sdastlcs90: 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/sdastlcs90 - from package: sdcc

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

Error in other languages:
sdastlcs90: bevel nie gevind nie
sdastlcs90: comandă negăsită
sdastlcs90: comando não encontrado
sdastlcs90: commande introuvable
sdastlcs90: command not found
sdastlcs90: käsku ei ole
sdastlcs90: không tìm thấy lệnh
sdastlcs90: komanda nerasta
sdastlcs90: Kommando nicht gefunden.
sdastlcs90: kommandot finns inte
sdastlcs90: komut yok
sdastlcs90: nie znaleziono polecenia
sdastlcs90: níor aimsíodh an t-ordú
sdastlcs90: no se encontró la orden
sdastlcs90: no s'ha trobat l'ordre
sdastlcs90: opdracht niet gevonden
sdastlcs90: parancs nem található
sdastlcs90: perintah tidak ditemukan
sdastlcs90: príkaz nenájdený
sdastlcs90: příkaz nenalezen
sdastlcs90: команда не найдена
sdastlcs90: командата не е открита
sdastlcs90: 命令找不到
sdastlcs90: コマンドが見つかりません