We are using AC15 in Teamwork. On a Snow Leopard ( 10.6.8 ) Operating System a mesh in one project does not show up in 3D while in Teamwork.
With mesh shifted away from it's Operators - it is visible.
Same project saved as Solo file - mesh is also visible, works fine.
Same teamwork project on Windows 7 PC - mesh is visible, works fine.
Been working on this file for months. We weren't working with the mesh when it happened.
We also lose our dimensions about once a month. I only mention this if there is a chance it is related. I understand a hot fix is being prepared for dimension problem.