get_assoc_sites_projects.pl: 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 Debian possible default full paths are:

/usr/share/gforge/plugins/globalsearch/bin/get_assoc_sites_projects.pl - from package: fusionforge-plugin-globalsearch

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