Hi MartyL,
Sorry for bringing this up again after almost two months.
I'm not using a network drive. All the source files and the project files themselves are on local.
Please check the attached snapshot, which I captured over a newly created test project.
I'd expect only newFile.cpp be listed in the "Add Source Files" dialogue because the other files are already in the projects.
P.S.
I have the hotfixes:
C:\Users\Username\Documents\My SlickEditConfig\15.0.1\hotfixes\hotfix_loader_se15013_3.zip (Revision: 3 )
C:\Users\Username\Documents\My SlickEditConfig\15.0.1\hotfixes\hotfix_se1501_8_cumulative.zip (Revision: 8 )
Thanks