sclangpipe_app: 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/sclangpipe_app - from package: supercollider-vim

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

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