MAPEDIT will not allow you to set date ranges for local fields beyond 1999.
The date range for local fields in MAPEDIT defaults to 1900-1999. However it is possible to change the valid date range by editing the MAPEDIT.INI file. You need to add a value for MaxYear (for example 2099), and/or MinYear (for example 1870), in the [defaults] section.
MAPEDIT.INI will be suitably updated on future DP4 CD ROMS.
Where the version affected is given as 4.5xx or 4.6xx, all versions of DP4 issued prior to the date of the fix are potentially affected. Where a specific version number is given the problem was introduced by that release and prior releases are unaffected. If a patch release number is also specified (in parentheses) , the fault was introduced at that specific patch level.