HRESULT 0xC00D1518 (NS_E_DATAPATH_NO_SINK): meaning and diagnosis

Status / error code:

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Description:

The data path does not have an associated data writer plug-in.%0

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NS_E_PLAYLIST_END_RECEDING	NS_E_INVALID_PUSH_TEMPLATE

NS_E_DATAPATH_NO_SINK

Server-side meaning of `NS_E_DATAPATH_NO_SINK`

What the server is validating

NS_E_DATAPATH_NO_SINK (0xC00D1518) marks the constructed data path has no data writer capable of consuming its packets. For NS_E_DATAPATH_NO_SINK, although the visible symptom may be interrupted playback, this HRESULT is raised at an administrative or distribution checkpoint.

For NS_E_DATAPATH_NO_SINK, a server distribution path connects a data source, parser, media header and one or more data sinks. When NS_E_DATAPATH_NO_SINK is returned, push publication adds an encoder-to-server control path, while client delivery uses a separate protocol and connection state. In a NS_E_DATAPATH_NO_SINK trace, trace input and output independently: source selection, parsing/header creation and sink selection are separate checkpoints. For NS_E_DATAPATH_NO_SINK, the decisive question is whether the live object and values match that boundary; the base AllStat description alone does not reveal the object generation, selected plug-in or lower-level failure.

A controlled correction

Capture 0xC00D1518, NS_E_DATAPATH_NO_SINK, the exact API/administrative action and the first failure timestamp.
Preserve data source, parser, data path object, broadcast/unicast sink collections and enabled states.
For NS_E_DATAPATH_NO_SINK, confirm that the object still belongs to the current WMServer, publishing-point or presentation generation.
Perform one isolated experiment: enable or attach the correct data writer and rebuild the data path before starting delivery.
Repeat the original NS_E_DATAPATH_NO_SINK operation through the same protocol and service account; do not substitute a different client-side test.
After NS_E_DATAPATH_NO_SINK, verify the expected next state and retain any later HRESULT as a separate pipeline result.

For NS_E_DATAPATH_NO_SINK, for automated tests, assert both the HRESULT and the resulting publishing-point, playlist, plug-in or archive state.

Code-specific failure anatomy

In a representative NS_E_DATAPATH_NO_SINK incident, the server reaches the constructed data path has no data writer capable of consuming its packets and rejects the operation before the caller can safely assume the next stage occurred. The incident record should therefore join data source, parser, data path object, broadcast/unicast sink collections and enabled states with the object generation and the exact administrative or protocol request.

A useful negative control is enable or attach the correct data writer and rebuild the data path before starting delivery. If that change advances the same NS_E_DATAPATH_NO_SINK call, the result supports this boundary. If NS_E_DATAPATH_NO_SINK remains, return to the first lower-level event instead of broadening the repair.

The tempting but misleading response is changing source credentials; packets still have nowhere to go. That action does not test the distinction that matters here: source plug-in not found is an input-side selection failure. For NS_E_DATAPATH_NO_SINK, this distinction is also why monitoring should retain the symbolic name instead of storing only a generic COM failure.

Evidence that separates this code

Evidence	Why it matters for `NS_E_DATAPATH_NO_SINK`
Decisive state	data source, parser, data path object, broadcast/unicast sink collections and enabled states.
Owning object	Record the server, publishing point, playlist, namespace node, plug-in or cache item that returned `NS_E_DATAPATH_NO_SINK`, including its creation or restart time.
First lower-level result	Preserve the earliest Win32, socket, COM, parser or plug-in event before the HRESULT; later wrappers can map several causes to `NS_E_DATAPATH_NO_SINK`.
Controlled comparison	Use a known-good object of the same type and vary only the precondition described as “the constructed data path has no data writer capable of consuming its packets”.
Security-sensitive data	For `NS_E_DATAPATH_NO_SINK`, log identifiers, lengths, hashes and redacted URLs where possible; do not publish passwords, authorization files or unrestricted client data.

Verification outcomes

Retest observation	Interpretation
The same call still returns `NS_E_DATAPATH_NO_SINK`	For `NS_E_DATAPATH_NO_SINK`, the rejected precondition has not changed, or the caller is still using an old object/configuration generation.
The operation advances and a later code appears	The `NS_E_DATAPATH_NO_SINK` boundary was cleared. After `NS_E_DATAPATH_NO_SINK`, diagnose the new code at its own source, parser, sink, network or client stage.
A new object succeeds while the retained object fails	For `NS_E_DATAPATH_NO_SINK`, object lifetime or stale context is part of the incident; update lifecycle handling rather than applying a machine-wide repair.
Only one publishing point, playlist, cache key or plug-in fails	For `NS_E_DATAPATH_NO_SINK`, the evidence favors object-specific configuration or content over a server-wide outage.

Changes that do not establish the cause

changing source credentials; packets still have nowhere to go.
For NS_E_DATAPATH_NO_SINK, avoid changing the publishing point, protocol, content and plug-in set in one test. When NS_E_DATAPATH_NO_SINK is returned, such a test cannot show which precondition cleared the code.
Do not suppress NS_E_DATAPATH_NO_SINK or replace it with a generic “media server error”; retain the symbolic code and owning operation in telemetry.

Comparison with adjacent states

Primary distinction: source plug-in not found is an input-side selection failure.

Nearby result	Different checkpoint
`NS_E_INVALID_PUSH_TEMPLATE`	Compare its own symbolic boundary and the first failing call; it must not be grouped automatically with `NS_E_DATAPATH_NO_SINK`.
`NS_E_PUSH_DUPLICATE_PUBLISHING_POINT_NAME`	Relative to `NS_E_DATAPATH_NO_SINK`, this neighboring result belongs to another state or validation branch even when the user-visible symptom is similar.
`NS_E_INVALID_PUSH_PUBLISHING_POINT`	For `NS_E_DATAPATH_NO_SINK`, use the object type and operation sequence to determine which result is authoritative.

Technical references

Close the incident only after NS_E_DATAPATH_NO_SINK clears on a current object.

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