Thank you for the question @Anonymous!
This message indicates that one of the files for the Revit 2018 installer is missing.
I tested downloading Revit 2018 (as part of the AEC Collection) and I’m seeing that the following 3 files are downloaded:
- Revit_2018_G1_Win_64bit_dlm_001_003.sfx.exe
- Revit_2018_G1_Win_64bit_dlm_002_003.sfx.exe
- Revit_2018_G1_Win_64bit_dlm_003_003.sfx.exe
Note: Depending on the version of Revit you may see different text in that middle bit (G1_Win_64bit_dlm).
Check that you have all three files. If missing one, download it, and retry.
Lance Coffey
Technical Support Specialist