HerculesStudio: 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/HerculesStudio - from package: hercstudio

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

On Debian possible default full paths are:

/usr/bin/HerculesStudio - from package: herculesstudio

You may install the required package with command apt-get install {package}

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