| Previous | Next |
| ERROR_INVALID_PEP_INFO_VERSION | ERROR_EXTERNAL_BACKING_PROVIDER_UNKNOWN |
ERROR_OBJECT_NOT_EXTERNALLY_BACKED
The object has no external backing provider
ERROR_OBJECT_NOT_EXTERNALLY_BACKED is a Win32 system result. Windows can represent files whose content is supplied by a cloud, synchronization, or tiering provider. This result means the operation expected such a placeholder or externally backed object, but the target is an ordinary local object or its provider relationship has been removed.
What the result means
The requested object is not backed by an external storage provider. For ERROR_OBJECT_NOT_EXTERNALLY_BACKED, keep the symbolic name, numeric value, and failing operation together in diagnostics; that combination distinguishes the exact failure path from nearby system results.
What to check
- Confirm that the path still refers to the intended file and has not been replaced locally.
- Inspect placeholder or recall attributes rather than relying on the directory name.
- Verify that the synchronization or tiering provider is installed, registered, and connected.
- Check whether another operation hydrated, de-pinned, moved, or converted the file.
Recommended handling
Use the normal local-file path for a locally backed object. Only invoke provider-specific recall, pin, or hydration operations after confirming that the target is still externally backed.
Developer notes
Object state can change between enumeration and action. Reopen or re-query the file immediately before provider-specific work, and handle the local-object case as a valid race rather than as data corruption. When a Win32 API reports ERROR_OBJECT_NOT_EXTERNALLY_BACKED, capture GetLastError() immediately; subsequent cleanup, formatting, or logging calls can replace the thread-local value.
References
Looking for a different code? Search another status or error code.