cobcrun: 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/cobcrun - from package: open-cobol

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

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