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Import Terrain from from other sources

I am trying to import a DSM and DTM created in another photogrammetry program (not Bentley) into Open Roads, I go to >open Roads Modeling>Terrain>Create>From File.   and I have the option of importing a xyz,las,tif,tfw.prj. However when I successfully import (says import complete) and processed for 10 seconds, I go to fit view and it is still blank.If I go to file explorer I do see it in there but cant get it to show on screen.

Anyone know whats going on here?