guidata-tests: 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/guidata-tests - from package: python-guidata

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

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