A symbolic link seems to be the issue. The actual location of the source files is on my Windows machine. I have shared and mounted the folder on linux, but the resulting path is ugly, something along the lines of /run/user/1000/gvfs/smb-share:server=ccenotti.domain.com,share=proj/src. I created a symbolic link to make the path a little less unwieldy, but that appears to be causing confusion with VisualGDB. I just changed my project to use the ugly path and it worked as I expected. Thanks!