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.

Ensure every Signal/Wait sequence is paired:

// Bad example – no exclusive sync
commandList1->CopyResource(destBuffer, srcBuffer);
commandQueue1->ExecuteCommandLists(1, &commandList1);
// Missing fence – then commandList2 accesses destBuffer

If the CDX exists but is corrupt:

If REINDEX fails, you must delete the CDX file manually after backing up the DBF, then recreate indexes using known key expressions.

| Field | Value | Meaning | |-------|-------|---------| | Component | CDX | Component DirectX – a user-mode graphics subsystem responsible for resource validation and command list processing. | | Error Code | 0x3 | DXGI / D3D12 resource state error: “Invalid resource transition” or “Exclusive access failure.” | | Subcode | 1 | Indicates object index 0 or first exclusive lock attempt failed. | | Keyword | Exclusive | The caller requested exclusive (write) access, but the resource is currently in shared (read) state or locked by another queue. |

Equivalent D3D12 Debug Layer Message:

D3D12 ERROR: ID3D12CommandList::ResourceBarrier: Exclusive access to resource (0x... ) cannot be granted because it is currently referenced by another command list or queue. [ STATE_SETTING ERROR #0x3: EXCLUSIVE_ACCESS_FAILED ]

To understand the error, we must break down its three components: cdx error 0x3 1 exclusive

The solution depends on the root cause. Below are the most effective fixes, ordered from least to most invasive.

If native commands fail, tools like:

These can often extract data even from severely corrupted CDX files.