rlogTOslog2: 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 CentOS possible default full paths are:

/usr/lib64/mpich2/bin/rlogTOslog2 - from package: mpich2-devel
/usr/lib/mpich2/bin/rlogTOslog2 - from package: mpich2-devel

You may install the required package with command yum install {package}

Error in other languages:
rlogTOslog2: bevel nie gevind nie
rlogTOslog2: comandă negăsită
rlogTOslog2: comando não encontrado
rlogTOslog2: commande introuvable
rlogTOslog2: command not found
rlogTOslog2: käsku ei ole
rlogTOslog2: không tìm thấy lệnh
rlogTOslog2: komanda nerasta
rlogTOslog2: Kommando nicht gefunden.
rlogTOslog2: kommandot finns inte
rlogTOslog2: komut yok
rlogTOslog2: nie znaleziono polecenia
rlogTOslog2: níor aimsíodh an t-ordú
rlogTOslog2: no se encontró la orden
rlogTOslog2: no s'ha trobat l'ordre
rlogTOslog2: opdracht niet gevonden
rlogTOslog2: parancs nem található
rlogTOslog2: perintah tidak ditemukan
rlogTOslog2: príkaz nenájdený
rlogTOslog2: příkaz nenalezen
rlogTOslog2: команда не найдена
rlogTOslog2: командата не е открита
rlogTOslog2: 命令找不到
rlogTOslog2: コマンドが見つかりません