I started my first Revit project recently and just ran into a problem I haven't been able to figure out yet. When I started the project I linked in the architect's model and used it to create my model. Later we swapped updated models. One of the changes to the architect's model was that had been moved slightly and rotated 90 degrees. The architect says my latest structural model still linked in fine in his model and aligned perfectly, even though I had neither moved nor rotated mine. But, on my computer, his linked in model does not line up at all with mine. How is this possible? Our Latitude and Longitude coordinates are still the same as well as the angle from project north to true north. How can my model line up with his, but his model not line up with mine? Any help would be appreciated.