@colin I am getting problem with my sketchup file, it is not opening in any version of sketch up. “This does not appear to be a sketch up model ” is the message from sketch up.
It is after midnight for me, but if you can reply with a link to the SKP, and the SKB if you have that too, someone else in the forum will see the message before I do.
I am still awake, but going to bed after this message!
Both files are almost completely filled with zeros. It isn’t possible to recover anything from them.