>I've opened an dbc in VFP 5.0 which belonged to a VFP 3.0 app.
>I needn't to say that it's the only copy of very important data.
>How to restore 3.0 format?
Andrzej,

Make a backup of the 5.0 version of teh database

In VFP 3.0 from the command window type;

COMPILE DATABASE Whatever

replacing whatever with the path and name of your dbc.

Then Immediately make a complete backup of the 3.0 version.

JimB