Why can't I add files to a book?

[Projectus]

I have no idea why, but I suddenly cannot add files to a book in FM 9. I've always done it by dragging or using "Add" from the menu bar.

Now, I go through the same motions, but nothing gets added. Anyone ever experience this?

[Jeff_Coatsworth]

You haven't accidentally locked the book, have you? Does it happen with a new book in the same location?

[Projectus]

It appears to only happen with this book. Locked? I didn't even know you could do that. I'll try to check if it is. Thanks.

[Jeff_Coatsworth]

Yeah, there's like a "view-only" state that can be tripped on sometimes - search the FM forum; there's been other instances of this

[Projectus]

Thanks a lot. I'll go poke around.

[Projectus]

Huh. Turns out that because all the FM files that I was given to work with were backups, I couldn't build a book with them. So I renamed them (removed "backup") and now it's fine. I never knew backups couldn't be used.