clc_synchronize.mpi: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/mpich/bin/clc_synchronize.mpi - from package: scalasca-mpich
/usr/lib64/openmpi/bin/clc_synchronize.mpi - from package: scalasca-openmpi

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