runantlr: 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/runantlr - from package: antlr

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

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