Should this not open the system dialog in the EDI folder? I have verified using DirectoryInfo that the directory does exist. However, the system dialog does not open in the folder that I think it should.
In 11.4 the same code works just fine.
It works for me in 11.7.3, 11.7.4, and 12.0. There weren't any changes to SYSTEM-DIALOG GET-FILE in 11.7.3. There may be some factor other than OpenEdge involved in the instance where it doesn't work for you.
Hmm, not sure. I have confirmed this when running from PDSOE on a Windows 10 PC as well as when running on a Server 2016 PC with ENT DB license.
The initial directory that opens is always the last to open with the windows file dialog.
If I use the .NET OpenFileDialog it works just fine.
In your environment are you running Windows 10 or Server 2016?