indi_lx200ap: 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/indi_lx200ap - from package: indi-bin

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

Error in other languages:
indi_lx200ap: bevel nie gevind nie
indi_lx200ap: comandă negăsită
indi_lx200ap: comando não encontrado
indi_lx200ap: commande introuvable
indi_lx200ap: command not found
indi_lx200ap: käsku ei ole
indi_lx200ap: không tìm thấy lệnh
indi_lx200ap: komanda nerasta
indi_lx200ap: Kommando nicht gefunden.
indi_lx200ap: kommandot finns inte
indi_lx200ap: komut yok
indi_lx200ap: nie znaleziono polecenia
indi_lx200ap: níor aimsíodh an t-ordú
indi_lx200ap: no se encontró la orden
indi_lx200ap: no s'ha trobat l'ordre
indi_lx200ap: opdracht niet gevonden
indi_lx200ap: parancs nem található
indi_lx200ap: perintah tidak ditemukan
indi_lx200ap: príkaz nenájdený
indi_lx200ap: příkaz nenalezen
indi_lx200ap: команда не найдена
indi_lx200ap: командата не е открита
indi_lx200ap: 命令找不到
indi_lx200ap: コマンドが見つかりません