runapp: 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/runapp - from package: listaller

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

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