Cdx Error 0x3 1 Exclusive Guide

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

Add the data folder as an exclusion in your antivirus software (Windows Defender, McAfee, Sophos, etc.). Then restart the application. cdx error 0x3 1 exclusive

If the user running the application does not have Read or Write permissions on the folder containing the DBF/CDX files, VFP will trigger error 0x3 when attempting exclusive access. Note that exclusive access often requires write privileges even for read-only operations because VFP writes temporary lock information. If the table is part of a Database Container (

If the CDX is corrupt, you must recreate it. But to do that, you first need exclusive access to the table. For free tables: USE YourTable

Method A – Using Visual FoxPro Command Window:

CLOSE ALL
SET EXCLUSIVE ON
USE YourTable.DBF EXCLUSIVE
* If the above fails with the error, skip to Method B.
DELETE TAG ALL   && Remove all index tags
PACK
INDEX ON field1 TAG tag1
INDEX ON field2 TAG tag2
* ... add all required tags
USE

Method B – Force recreate without opening CDX: