ref text in structure label missing when xref'd

- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report
I have a structure label consisting of 3 reference text, inverts in and out, and name. Two of the reference text are for existing grade and proposed grade (referencing the respective surface). The third is alignment station (for reasons that made this the easiest way to handle multiple alignments).
All the profiles are in one file and built from surfaces, alignments, and pipe networks data sourced in from other base files. All the labels with reference text populate correctly in the profiles dwg.
When I xref the base files into production files the labels with reference text in the profiles are missing the values for the existing and proposed grades. The reference text for the alignment station are fine.
I have not yet understood why these surface references are broken. I tried data sourcing the surfaces into the production files to no avail. I have promoted the surfaces in the profiles base file which brought no joy either.
Does anyone know what is breaking the reference or logical next try?
Many thanks,
Fred