Why this error is reported (and synchronization is not finished)?


I am trying synchronize quite simple 3D model, but this error is reported during the synchronization:

ERROR [0x0000475c] iModelBridge - Project extents are too narrow: 0.000000 (ratio of largest footprint dimension 
to height; expected greater than than 0.100000). Element geometry this expansive will affect display performance, 
and often indicates corrupt elements or transforms.

I do not understand what is wrong and how DGN file should be corrected.

With regards,