rmeventc: 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/rmeventc - from package: omnievents

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

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