asvector: 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/asvector - from package: libAfterImage-devel

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

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