VISTA 4.4 DATASET IN "DB Folder" MISSING?

One day we cannot open vista 4.4;
Dataset is empty (data on server is all intact).
Why can’t I see any data file in “open dataset”?
Thank you

Vista 4 uses FoxPro as its database. Make sure the users workstations have access to location where the files are stored (they have the extension of .FPT, If I remember correctly)

Thank you Calvin!! happy to see you here.
Aldo