NET USE * /DELETE (if network) or restart file server.
Antivirus real-time scanners and backup agents sometimes lock .CDX files while scanning or copying. Since error 0x3 occurs especially with exclusive access, any external lock will cause the VFP engine to fail. cdx error 0x3 1 exclusive
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. NET USE * /DELETE (if network) or restart file server
Never share a ID3D12CommandAllocator across threads without full GPU idle (via fence value check). cdx error 0x3 1 exclusive
Yes. If the CDX file is read-only or corrupted, even one user cannot open it exclusively. Also, if another hidden process (like an indexing service or backup tool) has a lock.
If another process holds an exclusive lock: