jana-ecal-event: 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/jana-ecal-event - from package: libjana-test

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

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