Hi Christian,
In Umberto NXT Efficiency there is a all functionality of Umberto NXT CO2 integrated in including the GWP-Sankey (last entry in the "Sankey-Dropdown-Menue). So I wonder why you came across the problem that it is not available. could it be an old Umberto NXT Efficiency version, which does not yet include Carbon Footprinting?
Currently there is no plan to include the extended export from Umberto NXT LCA and Universal to CO2 or Efficiency, the price difference is also justified with such differences in functionality.
It's clear that it would be nice from a consultants perspective to exchange between all versions to reduce double work. Currently this is not possible, as most clients work only with one Umberto version, it is under discussion, if for consultants, a "save as" Umberto NXT xxx project is implemented to support this special request from trainers and consultants, but it's not yet decided and so no release plan for this functionality is available.
Please check with the latest Umberto NXT Efficiency Version if there is no GWP-Sankey it should be there!
Best regards,
Martina