rbqtapi: 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/rbqtapi - from package: ruby-qt4

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

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