HRESULT 0xC1210258 (EVT_WDSMCS_E_CP_CLOSE_INSTANCE

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Description:

The content provider could not close an instance.

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EVT_WDSMCS_E_CP_OPEN_INSTANCE_FAILED	EVT_WDSMCS_E_CP_OPEN_CONTENT_FAILED

EVT_WDSMCS_E_CP_CLOSE_INSTANCE_FAILED

EVT_WDSMCS_E_CP_CLOSE_INSTANCE_FAILED is a Windows Deployment Services (WDS) Multicast Server result. It indicates that the provider returned an error while WDS Multicast Server attempted to close an existing instance.

What to check

Check for active sessions, outstanding callbacks, and content handles that prevent orderly shutdown.
Log the provider-specific close error and instance identity before the reference is discarded.
Correct provider cleanup sequencing so repeated close or service restart operations remain safe.

Microsoft documentation on the Windows Deployment Services Multicast Application Protocol

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