Mixed Linked And Unlinked Files.

You can combine linked and unlinked surveys in the same project. For example:

DOGCAVE.DAT        -- No Links

CATCAVE.DAT                -- No Links

PIGCAVE.DAT                -- EF23

COWCAVE.DAT        -- No links

Here, there are no links between DOGCAVE and CATCAVE, so the compiler remembers all the stations in DOGCAVE while it processes CATCAVE. However, when PIGCAVE is processed, there is one link, EF23. As a result, the compiler "forgets" all the stations in DOGCAVE and CATCAVE except EF23. Finally, there are links from PIGCAVE to COWCAVE, so the compiler remembers all the stations in PIGCAVE when it processes COWCAVE.