The file that the program was asking for is called V_STREF.DBF.The "F" was cut off on the dialog so it looked like ".DBI", but it is a DBF file.
The "V_??REF.*" files were first added to the program for ROOTS IV version 1.1, but then they had an X rather than a V. This is when all of the GEDCOM tags for the original roles in the R4 library files were added. When R4 1.1 was released, instructions were included for the user to update the library files using the "Check" routine.This would add the GEDCOM tags and some new events to the Event and Role libraries.
The "REF" files are also used to restore missing event, role and source templates using the Check routine.
If you started with ROOTS IV, you might not have the "V_??REF.*" files, but you may have the "X_??REF.*" files.The "V" files should have all been installed even if you updated from ROOTS IV, but maybe they aren't.Anyway, they can be found in the Library subdirectory of where the program was originally installed.For example, if you started with ROOTS IV, it might be ROOTS4LIBRARY.If you now have your files in the UFT directory, it might be UFTLIBRARY.
I'm not one of the programmers, so I'm not real positive on this next point.When the program asks for the V_STREF.DBF file, I believe it's because there is a missing template or GEDCOM tag that the program uses for the export.Normally, the program will find this file on it's own, but maybe you had your data files in a directory different from where the "REF" files were located -- or your "V_??REF" files are named "X_??REF".
Since you no longer get the error, it is possible that the program did find the necessary file and that missing template or tag has been restored.
If you ever create another GEDCOM file or you attempt to update the library files using the Check routine and you get a message asking for V_STREF.DBI (actually .DBF) or one of the other "REF" files, change to the Library subdirectory and select the file and open it.Remember, your "REF" files might be called "X_??REF", so open the "X" equivalent of the "V" file if asked.