Sliding Mesh Issue
 

Hi all, am having trouble with sliding mesh rotor-stator (2D) case. Single stage mesh with two fluid zones, periodic BCs on top/bottom. Testing out the solution with basic S-A turbulence model, density-based solver (FLUENT v. 12)...there seems to be a problem with my grid interface. The two interface boundaries are essentially the same length (off by 1E-7 meters), and my understanding was this was within tolerance. i've assigned the interfaces to be periodic, and the overall procedure matches a similar simulation I've run previously. Help please :)?