aaindexextract: 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/aaindexextract - from package: emboss

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

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