simcrs-config: 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
/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/bin/simcrs-config - from package: simcrs-devel

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