HRESULT 0xC00D119D (NS_E_WMP_INVALID_ASX): meaning and diagnosis

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The playlist cannot be opened because it is stored in a shared folder on another computer. If possible, move the playlist to the playlists folder on your computer.%0

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NS_E_WMP_NONMEDIA_FILES	NS_E_WMP_ALREADY_IN_USE

NS_E_WMP_INVALID_ASX

Diagnosing NS_E_WMP_INVALID_ASX in the Windows Media Player playback path

NS_E_WMP_INVALID_ASX (0xC00D119D) is returned when the Player rejects an ASX playlist in the selected location or trust context even if its text may parse.

Keep the exact ASX bytes, source URL, trust zone, and parser decision together. A syntactically readable playlist can still be rejected because its location, references, or security context violate the Player contract.

Controlled playback comparison

Freeze the current object state and collect UNC/share path, zone, credentials, file attributes, ASX contents and local-copy result.
Reproduce this result once without automatic retries or fallback applications.
Change only one precondition: copy the unchanged playlist to the local playlists directory and compare load behavior.
Compare the first nested status and next Player event with the failed run.
After testing it, restore the original configuration if the change was diagnostic only.

Actions that obscure the cause

rewriting all REF URLs before testing the same file locally.

Technical references

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