forge_wrapper: 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 Debian possible default full paths are:

/usr/share/gforge/bin/forge_wrapper - from package: gforge-common

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

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