genCumulative sun mtx issue

Hi!

I am using grasshopper on Rhino 7 and am trying to get the gen cumulative sun mtx. After connecting my epw file, setting the sky density to 0, and setting run it to true, I get an error stating:

How do I fix this?
best,
Dana

Hi Dana - please visit https://discourse.ladybug.tools/ for questions related to the Ladybug Tools.
-wim