O.k.,

thank you. I got the UUID on the host side. The problem is the guest side. Right now I can not get the Vix API (virtual disk API) to work (some error about licensing - although we are using licensed versions for vCenter and hosts). Also, I am not to fond of having to use a C-coded executable to access the guest, when for the host I can use scripting language. Anyway, I am still trying...

Greetings,

Stefan