Cdx Error 0x3 1 Exclusive ((top)) <2026 Release>

: Often a sub-code or state indicator within the application's error handler.

CDX files are binary. If a write operation was interrupted (power loss, forced reboot, application crash), the CDX file’s internal structure can become corrupt. VFP checks integrity during exclusive open; corruption triggers the error. cdx error 0x3 1 exclusive