Wondering how many members save their projects to a network share? Reason I ask is because for the second time I am having the same problem. After creating a project any subsequent closing and reopening of that project looses the Model stack, all Plan Sets and Material Files in 3D don't save. The drawing changes themselves save fine so it is saving the individual drawings, but the .spp file never updates the modified date and I am guessing that is where all that other info is changed.
This started last year when I started saving all drawings to a shared folder on one PC, then is seemed to go away and started working. Now this spring I installed a Windows 2016 server and started saving all files to that and the problem is not going away and getting really frustrating. I don't see how it can be a permission issues as the drawings files save and all of my Symbols, textures, libraries, ect all are on this server and they all work fine in Soft Plan. I have the same problem on 3 PC's running Soft Plan so it is not only on one machine. For what ever reason that .spp file will not update after the original save when it is created.
Also because I am Soft Plan+ it tells me every time I open a project that the version on the server is newer then the local file because of this. Worse yet it does not happen to all projects, and it could work fine on a project for a few days and then be a problem on the next day for the same project, very random it seems.