simvoleon-config: 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/bin/simvoleon-config - from package: SIMVoleon-devel

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

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