AutoCAD Civil 3D

[#1]

I have a project with a sheet set (both created in C3D 2012) that was working fine up until a couple of days ago.  Now, when I open the sheet set, there is nothing there.  And any sheet set I open is blank.  Any ideas??

Civil 3D 2012 (current SPs) 64x

Windows 7 Ultimate 64x

8GB RAM

[#2]

Set SSLOCATE=1 & SSMAUTOOPEN=1.

I have heard others state that, even with those variables set correctly, occasionally they will get a sheet set that will not open automatically. I have not heard of a solution.

[#3]

I had this issue a few weeks ago, opened a sheet set and nothing showed. Opened the same SS on a different PC and all files were fine. I ended up having to do a complete uninstall, reinstall of C3D2012.

[#4]

Well, The same thing just happened to us and we don't really know why.

I opened a SS this morning that 2 others were working on. Nothing unusual so far.

But.

It was empty. I assumed since it was a new project, it just hadn't been set up properly.

I added some drawings and filled in some properties.

This afternoon, the two other people got out of AutoCAD and when they got back in, the SSM was empty.

They had spent most of the morning renaming/renumbering the files in SSM so the restoration from yesterday was ot good. After several more restoration attempts, we had to just recreate the SS. (Easier than re-pathing everything) Not too bad, only a couple dozen drawings, but still.... what the heck happened?

During the process, I opened up other SSs and they, too, were blank. Scary!

I'm scared to open SS with my machine now.