'slowness' error while using stream.ppoints()

Yes the iasp model is used by default, but to calculate piercing points you need to know something about the incoming ray.

I think when you want to use rf in spyder, you need to install rf into the same environment spyder is installed in. You can check the installed packages with conda list.

I couldn’t upload the SAC file “unauthorized”…

What a pitty, maybe we can improve on that, see Upload attachments to post.