odbxplustest: 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/odbxplustest - from package: opendbx-utils

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

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