aewm++_setrootimage: 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/bin/aewm++_setrootimage - from package: aewm++-goodies

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

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