What does HRESULT 0xC00D0BD7 (NS_E_ATTRIBUTE_NOT_ALLOWED) mean?

Status / error code:

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Constant name:

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Operating System:

Description:

An attempt was made to add attribute that is not allowed for the given media type

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NS_E_ATTRIBUTE_READ_ONLY	NS_E_INVALID_EDL

NS_E_ATTRIBUTE_NOT_ALLOWED

A practical diagnostic path for `NS_E_ATTRIBUTE_NOT_ALLOWED`

The diagnostic value of this result (0xC00D0BD7) is its location: the attribute is valid in the SDK but not legal for the selected media type or object. That location is the attribute not allowed media-format check, not a generic statement that the file or server is unusable.

Profile and sample evidence

Capture	Why it matters
Owning call	Record the API method, object identity, thread or callback and timestamp for the attribute not allowed media-format check.
Values to record	object interface, attribute or property identifier, stream number, data type, mutability flags and the operation used to set or retrieve it.
Comparison case	Use one known-good resource that exercises the same attribute not allowed media-format check while changing only the rejected precondition.

A controlled media-format test

Log 0xC00D0BD7, the exact operation and the first failure time.
Preserve object interface, attribute or property identifier, stream number, data type, mutability flags and the operation used to set or retrieve it.
Perform one isolated test: query the object capability and existing attribute type first, then perform the same operation on one documented writable property.
Repeat through the same API and protocol path; a different player or local-copy test is useful only as a comparison, not as proof that the attribute not allowed media-format check is fixed.

What completed, and what did not

Before the attribute not allowed media-format check, earlier setup may have succeeded, but the attribute is valid in the SDK but not legal for the selected media type or object was not completed. This is why logs should preserve both the last successful call and it.

For a targeted comparison, query the object capability and existing attribute type first, then perform the same operation on one documented writable property. This isolates the disputed precondition without changing the media identity or unrelated machine settings.

Misleading actions

changing several profile and codec settings at once, which hides the first incompatible field.
Record redacted identifiers, lengths, hashes and protocol fields needed to reproduce the attribute not allowed media-format check.

Nearby results are not interchangeable

Main distinction: not-allowed is a context rule, not a statement that the named attribute is globally read-only.

Nearby HRESULT	How to compare it
`NS_E_INVALID_NUM_PASSES`	the application used a preprocessing-pass sequence incompatible with the output mode.
`NS_E_ATTRIBUTE_READ_ONLY`	the caller attempted to modify an attribute whose value is owned or computed by the SDK.
`NS_E_INVALID_EDL`	the edit decision list contains invalid timing, ordering or source-range information.

Technical references

Retain the post-fix trace so a later pipeline result is not mistaken for recurrence of this failure.

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