When using the viewport you are trying to import a PDF, CAD, IFC or Image file and receive the error message “File <filename> does not exist. Verify that the correct file name was given”.
This is because Windows has a maximum length of 260 characters for folders created on your computer's hard drive.
To resolve this problem you should rename some of the subfolders to reduce the maximum length to within 260 characters.
Fig. 1 Path greater than 260 characters