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.



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

Have a nice day