2009/11/16 Federico Fortini <Federico.Fortini(a)gruppolen.it&gt;: ESX and ESXi are basically the same from the API point-of-view. Please post the complete traceback of the exception. How do you call the script? What arguments do you pass to it? Does the script prompt you to enter username and password or does it print the error immediately? If it reports an error immediately, make sure you use a libvirt version that includes ESX support, release 0.7.0 and later. Also make sure your libvirt version is compiled with ESX support enabled. The ESX driver requires libcurl version >= 7.18.0. The configure script automatically disables the ESX driver if the libcurl requirement is not met. Matthias