Yes, the roofs are over one floor. I have discounted the other rooms covered by other roofs, but even so, I have run into difficult. I will try one roof instead Thanks.

A quick follow up to this, for the sake of other users. Remoted onto users systems, checked installation - the installation was made up of mismatched objects, with update 3 applied, but only content pack 1. Content pack 1 leaves the Blinds data in a different…

Hi, If a v25 project is opened in v26 then a v25 version of the project is saved automatically within the project folder under the name of "Version 25 Backup". This can be used for your Part L 2010 calcs.