Hardwere rack in mixer Nuendo 11

Hallo. I use Nuendo 11 with Steinberg UR 44. Butthere are no hardwere rack in mixer. Dsp mix fx standalone app stops work when I run Nuendo. So how I can use all fitures (dirrect monitoring, dsp mix fx plugins), and others?

Did you follow the setup procedure in the manual?
If so, it should work…
Make sure you configured the input busses correct.