When trying to relocate the project using Manage->Project Location->Position->Relocate the Project to match the real local coordinates of the site it is not possible to use values larger then 9144000mm. In practice, the coordinates are very often larger than this value.
9144000 mm error reported when relocating the Project Base Point
However, relocating the Project base Point by editing on screen its coordinates, which show up when the point is selected, mysteriously does not pose this kind of problem to Revit.
No error reported when the coordinates of the Project Base Point are edited directly
Similar situation happens when there is a (less frequent) need of relocating the Survey Point. In this case however the Survey Point must be “detached” (the paperclip symbol next to it must be crossed) in order for its coordinates to be editable – as shown below.
Coordinates of the Survey Point edited on-screen