scout.omp: 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/mpich/bin/scout.omp - from package: scalasca-mpich
/usr/lib64/openmpi/bin/scout.omp - from package: scalasca-openmpi

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

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