Hello, I first noticed this problem when I tried to export revit models to Navisworks and they started coming in at different Z coordinates. 2 arch models came in the same, but structural and mechanical came in 1'4" higher.

Anyway, I just updated a link file today and noticed it came in 1'4" lower than the core & shell model provided by the architect. Whats weird is that the levels in both linked models (from same architect) say they are the same elevation but they are 1'4" off. see attached image. I also noticed that in the Core & Shell model the project base point is 172' 7 3/4" and in the TI model the base point is 1'4". I'm sure that has something to do with the difference but i don't know what to do to resolved the issue. Any ideas on the best practice here?

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