Our company has a 15 year old, very large DOS based system which consists of a main module and many add-ons. We want to convert it fully to VFP (i.e. DBC, report forms, etc.) but the reality of what that will take is starting to sink in. What we're wondering is how feasible is it to do a phased migration?

For example, if we leave our existing tables as free tables and use local views to access/update them, then we can leave much of the DOS system in tact while we take a more gradual approach to the upgrade.

Is there anyone who has any experience with this sort of thing that can give me some advice before I get too far along with the project?

TIA