DC radiation analysis problem

Hi everyone,

running some point in time DC grid-based radiation analysis, I notice that when the ratio between global and diffuse is equal to 1 (there is still diffuse radiation), the simulation doesn’t work.
In particular, the report says: There is 0 sun up hours.
I tried different hours, days, locations and recipes (for instance illuminance). However, the problem persists.
Any ideas of the possible cause?

Attached the screenshot of the grasshopper canvas.

Thanks,

Andrea

After some attempts, I was able to bypass the problem running an annual simulation and selecting then the specific hours.

Have a nice day

Andrea