When DBF/CDX files reside on a network share (common in legacy systems), network latency or partial SMB protocol mismatches can cause file handles to drop momentarily. An exclusive open attempt during a micro-outage yields error 0x3.

When this error occurs, users may notice:


If the table is part of a Database Container (.DBC):

OPEN DATABASE YourDatabase
VALIDATE DATABASE RECOVER

For free tables:

USE YourTable.DBF EXCLUSIVE
VALIDATE TABLE