Has anyone looked into this more? We are having same problem, although it will happen within the course of a few minutes with the file open.
We have our drawing borders in external files which are specific for each of our primary clients. The master layouts in our template file are linked to the "Generic" Border. Once you start a new project, you select all the border files in Drawing Manager and re-link them to the proper client border file. Update and all the drawing masters are correct for that project.
On many projects these border files are showing up as unavailable, even if they have not changed locations on the server, the file they are linked to has not changed locations. We have tried combinations of Auto update vs manual, relative vs absolute path, etc. Nothing seems to resolve it.
Also, once the files are shown as unavailable, you can not select all of them and relink, if you do, nothing happens. You choose the file they are in click OK but nothing. If you select an individual and link to the view within the file for that paper size, it will then update and then all the others show as OK.
kevin s burns, AIA
massachusetts, usa
AC25 (1413), since AC6
Windows 10
Intel Core i7 -8700 @ 3.2 GHz~ 16 GB ram