Many thanks for your hints.
After have checked those points ( CPU options...), my system runs
like before. (It's now possible to load 30 Masterverbs x, in an empty project)
It's good to feel helped, thanks again.
Hi everybody ; When i'm trying to load scope project there's this message (PCI Master Overflow...) It occurs when i launch Reaper After searching in many ways, i can't get more than six tracks (Asio source) from every scope projects. when i add two more tracks(8), then the PCI message appear again ...