aspline: 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/aspline - from package: spline

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

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