What does HRESULT 0xC00D1392 (NS_E_NAMESPACE_NAME_TOO_LONG) mean?

 
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NS_E_NAMESPACE_CALLBACK_NOT_FOUND NS_E_NAMESPACE_DUPLICATE_NAME

NS_E_NAMESPACE_NAME_TOO_LONG

Where the condition occurs

This result (0xC00D1392) marks a node name exceeds the namespace component length accepted by the server. Treat the symbolic name as a map to the owning Windows Media Services subsystem rather than as a request to reinstall every media component.

Windows Media Services persists server configuration as a typed hierarchy; nodes have names, value types, security classifications and persistence rules; callbacks are attached to particular nodes rather than to arbitrary strings. In the trace, when configuration was imported or replicated, compare ServerNamespace.xml, NameSpaceDelta.xml and plug-in registrations, but do not edit those files while WMServer is running.

Code-specific failure anatomy

A representative occurrence is when a node name exceeds the namespace component length accepted by the server. Capture the unescaped component length, full path length, generated prefix/suffix and character encoding together with the object instance and the exact administrative or protocol request.

For a useful negative control, shorten the single offending component while preserving a stable external-to-internal name mapping.

The tempting but misleading response is only increasing an output buffer; this validation rejects the stored name, not the retrieval buffer. That action does not test the distinction that matters here: buffer too small is fixed by caller allocation; name too long requires changing the proposed identifier.

What to record before changing anything

Controlled comparisonUse a known-good object of the same type and vary only the precondition described as “a node name exceeds the namespace component length accepted by the server”.

Smallest useful experiment

  1. Capture 0xC00D1392, the symbolic name, the exact API/administrative action and the first failure timestamp.
  2. Preserve the unescaped component length, full path length, generated prefix/suffix and character encoding.
  3. Perform one isolated experiment: shorten the single offending component while preserving a stable external-to-internal name mapping.

Related codes are different

Primary distinction: buffer too small is fixed by caller allocation; name too long requires changing the proposed identifier.

Nearby resultDifferent condition
NS_E_NAMESPACE_DUPLICATE_NAMEa sibling node with the requested name already exists.
NS_E_NAMESPACE_CALLBACK_NOT_FOUNDan unregister operation names a callback that is not attached to the node.
NS_E_NAMESPACE_EMPTY_NAMEa create or lookup operation supplied an empty node-name component.

Changes that do not establish the cause

  • only increasing an output buffer; this validation rejects the stored name, not the retrieval buffer.
  • Avoid changing the publishing point, protocol, content and plug-in set in one test; such a test cannot show which precondition cleared the code.

Technical references


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