R vE

Thank you very much! It's all working now.

Another, non-Excel question is why I am no longer able to respond to answers here on Stack Overflow. I can see links for "Share, Edit, Follow, Flag" - but no "Add Comment". I have been using Stack Overflow for many years, and it's only in the last couple of days that I have been unable to add comments. I thought it might be something to do with being at work, but I also tried at home (on Firefox and Edge) - no no avail. Does anyone know why comments can't be added now?