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NS_E_OPEN_FILE_LIMIT
NS_E_OPEN_FILE_LIMIT — 0xC00D0031
Diagnosing NS_E_OPEN_FILE_LIMIT
NS_E_OPEN_FILE_LIMIT identifies this Windows Media Services boundary: the client cannot have any more files open simultaneously.
Why this boundary matters
This HRESULT is tied to one concrete file operation. Preserve the canonical path, service identity, access and sharing mode, requested offset or allocation, and the first native filesystem/storage result; a later server HRESULT can hide the original failure.
Evidence to collect
| Field | What to preserve |
|---|---|
| Object | Canonical path or server-side file identity plus the exact open/read/write/allocate operation. |
| Security | Service account, desired access and sharing mode used by that operation. |
| Extent | Offset or allocation size, requested byte count and completed byte count where applicable. |
| Native result | The first filesystem/storage error returned before Windows Media maps it to this HRESULT. |
Decision rule
A path that exists is not enough: success requires the same service identity to complete the same file operation with the expected size and sharing semantics.
Focused test
Record the client/session identity, number of simultaneously open files and the configured limit. Close a known stale or completed file handle, then retry in the same session.
Verification
Repeat the same file operation under the same service identity and against the same object. Require the requested open/read/write/allocation to complete with the expected byte count or state; a different native result is a new diagnostic boundary.
Technical references
- Expanded use of publishing points
- Sending ASF data to a publishing point
- Receiving a live stream
- Microsoft HRESULT values for the Windows Media namespace
For automation, log the symbolic name as well as the numeric HRESULT. The symbolic name preserves the Windows Media subsystem boundary that a generic COM error formatter can obscure.
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