Every time I want to view a post on a thread that has multiple pages, such as birthday thread, when I go to the last page and click on new posts this is what I get-
"The error returned was: Sorry, some required files are missing, if you intended to view a topic, its been moved or deleted. Please go back and try again."

This has been happening ever since the board moved to format with collapsed posts. I was trying to read birthday postings but couldn't.

Swiminbuff

When I first looked at the board today, it was when I did a search from the home page. I clicked on the link for an old discussion and when I got to it, it listed all the replies in what I think is the collapsed format you're talking about. There's an Options button on the thread at the top. I clicked on it, and under "Display Modes" clicked on "Standard." It then went back to the way it normally displays for me, and now when I came back to the board to look at the most recent posts, it's still displaying normally. So you may want to try this.

Thank you Joe, that solved the problem