I came across this error too (failed GenerateSunpath) when doing HB Annual Irradiance, but could resolve it by updating the Radiance files to latest 5.4a version. @Anyone and @js, perhaps your different systems had different Radiance versions?
For me however it’s still an issue as I’m using Accelerad for other Radiance tasks and would like to use the same for annual calculations. Accelerad fails the same way as 5.2a version of Radiance does for annual calculations.
For Daylight Factor for example, I can run it successfully with Accelerad (as long as radiance_check=False).
@chris, any ideas on what’s going on from the logs posted in here earlier, or why it would work on 5.4a and not 5.2a/Accelerad 0.7beta?
edit: I’m using LB/HB 1.5.0 and ran the LB Sync Grasshopper File beforehand.