PBP / SP Value via Background Open

Hi!

I am trying to batch open a selection of RVTs from a folder, access the Survey Point / Project Base Point values (E/W, N/S, Elev ETC) and publish these to an excel spreadsheet.

I can get the files from the folder to publish their file path, file name to excel - but am getting no values on the Survey Point / Project Base Point coordinates?

Originally I was trying to use Categories / All Elements from Category node sequence - but I think this is selecting elements from the open file only. Are there nodes which would allow me to access this content from the background open?

Thanks,
Jaclyn