reportlog.cgi: 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/lib/xymon/server/bin/reportlog.cgi - from package: xymon

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

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