aelparse: 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/sbin/aelparse - from package: asterisk

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

On Debian possible default full paths are:

/usr/sbin/aelparse - from package: asterisk
/usr/lib/debug/usr/sbin/aelparse - from package: asterisk-dbg

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

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