| Previous | Next |
| NS_E_INVALID_KEY | NS_E_INVALID_TTL |
NS_E_INVALID_PORT
NS_E_INVALID_PORT — 0xC00D0043
This result belongs to invalid streaming port not to a generic restart checklist, because the configured or requested port is outside the accepted range or unsuitable for the selected transport/binding.
Start at the returning layer
Media delivery configuration combines a local adapter object, address, port, transport, route, multicast group, and TTL. In the context of invalid streaming port, validate these dimensions separately so that a name-resolution error is not diagnosed as a firewall or bitrate problem. Locate the first component changing state in this condition and distinguish later summary errors.
Important boundary. An invalid port is distinct from an allowed port that is already in use or blocked by a firewall. Record the exact constant and returning API.
Minimum useful evidence
| Preserve | Why it matters |
|---|---|
| Numeric port, transport/protocol, local address, publication, and server version | Ties the message to one server object and one transition instead of a later retry. |
| Reserved/privileged use, current listeners, exclusions, and firewall policy | Separates configuration or identity from storage, parser, network, or lifecycle state. |
| Byte-order or string-to-integer conversion in the caller | Provides a stable before/after comparison for the proposed correction. |
| Multicast destination details where applicable | Shows whether the status is expected information, a warning, or the first failure in the event sequence. |
Prefer identifiers, versions, counts, hashes, state transitions, and redacted paths; media content, credentials, keys, and user data are rarely needed in routine incident logs.
Separate state from data
- Test a known free allowed port on the same adapter. Record the first server event, object state, or return value that changes.
- Hold the port fixed while changing only the transport if supported. Keep media bytes, server identity, and unrelated publishing-point settings fixed.
- Inspect the listener table before and after the server bind attempt. Use a disposable publishing point or maintenance window when the test can alter server or storage state.
Retry only after one controlled server, object, route, storage, or input condition changed; an uncontrolled service restart creates a new execution context and is not proof that the original condition was transient.
Nearby states and false leads
| Observed comparison | Interpretation |
|---|---|
| A known-good object succeeds through the same component | The platform path exists; concentrate on the production object, identity, metadata, or state captured above. |
| The control fails at the same first operation | Preserve server, storage, plug-in, topology, and network evidence before modifying media or publishing-point data. |
| The status changes after one deliberate adjustment | The diagnostic boundary moved; the replacement status now describes the next contract to investigate. |
Verification after correction
Correction: Validate the transport-specific range and choose a stable unconflicted port represented consistently in configuration. Keep the original server configuration, event sequence, object inventory, input hash, and topology snapshot so the change can be reversed and explained.
Accept the repair only when the server binds the intended endpoint, clients negotiate the expected transport, and invalid boundary ports are rejected early. Repeat the original supported operation under the original identity and object state; a simplified media file, replacement server, new session, or different client is useful comparison evidence but not final regression proof.
Technical references
Use these Microsoft references for the formal contract and combine them with the exact server or catalog evidence from the incident: Check version-specific behavior against the Windows Media Services and SDK generation that produced the event.
- Microsoft Open Specifications: HRESULT values — defines the formal status or component boundary.
- Microsoft: Windows Media Services 9 Series SDK — documents the relevant API or lifecycle.
- Microsoft: programming the Windows Media server object model — provides the architecture, format, or protocol context.
- Microsoft Open Specifications: media streaming server scenario — supports the controlled verification criteria.
Looking for a different code? Search another status or error code.