This might be an element display issue. Make sure all levels are turned and verify if there are xref (reference) that are attached that might actually contain the graphics you seek.
What version of MicroStation or Bentley product are you using?
Can you provide the DWG file provided in this PDF?
Using the latest version of Bentley View
there are two missing reference files. I'd bet that's the problem.
I ask the designer about this. Thank you.