What does HRESULT 0xC00D1073 (NS_E_WMX_ITEM_UNSETTABLE) mean?

NS_E_WMX_ITEM_UNSETTABLE

Understanding NS_E_WMX_ITEM_UNSETTABLE in a Windows Media playlist

NS_E_WMX_ITEM_UNSETTABLE (0xC00D1073) is returned when the playlist item exists but the selected property or slot is read-only in its current representation.

Distinguish in-memory Playlist state, WPL or ASX parsing, nested-list expansion, Media-object resolution and execution of referenced items. Record what the Player had already completed because later retries often replace the original evidence. The specific rejected condition is the playlist item exists but the selected property or slot is read-only in its current representation.

Minimal playlist experiment

1. Start from the original call and log 0xC00D1073 together with its object and operation phase.
2. Collect item type, property name, load source, auto/static playlist status and access rights before changing the machine.
3. Use this single-variable test: copy the media reference into a newly created static playlist and attempt the same edit there.
4. Repeat on a fresh object if the original predates a configuration, device or resource change.
5. Validate the expected next operation, not just initial open or object creation.

What the result means

Actions that obscure the cause

• changing file-system permissions when the restriction belongs to the playlist object model.

Technical references

• Windows Media Player SDK
• Windows Media Playlists
• Windows Media Playlist elements
• Managing playlists
• Microsoft HRESULT registry