warning: could not open file Sphere.cache

[agrinin]

I follow the example of the Mie-scattering and get the following warning. What does it mean and how to avoid it?
ubuntu@ubuntu2004:~/scuff-em/myscuff-em$ scuff-scatter < Args
warning: could not open file Sphere.cache (skipping cache preload)
Thank you for your support!
Alexey

[texnokrates]

That should be benign, you don't need to worry about the warning. SCUFF-EM saves certain values to this cache file, so it doesn't have to recalculate them on the next run.

Just FYI, this repo hasn't been updated for years, and even the pull requests for known bugs have not been merged. I recommend using my fork https://github.com/texnokrates/scuff-em, which has some of the known bugs fixed.