Thanks, Bill. We think it has to do with missing values, too, but couldn’t do much more diagnosis than that. Do let us know when it’s been fixed, since it’s part of a module we’re teaching in February.
And thanks for the Google drive link warning…we generally use sharing, but I forgot..
Also, I think the timestamp on the forum is buggy – it’s telling me that you sent your reply at 5:49PM on 12/25. Unless you’re in Europe somewhere?
Happy holidays!!