What does HRESULT 0xC1210303 (EVT_WDSMCS_E_NSREG_FAILURE) mean?

 
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EVT_WDSMCS_E_NSREG_NAMESPACE_EXISTS WDSTPC_E_CALLBACKS_NOT_REG

EVT_WDSMCS_E_NSREG_FAILURE

EVT_WDSMCS_E_NSREG_FAILURE is a Windows Deployment Services (WDS) Multicast Server result. It indicates that namespace registration failed after a provider or server operation returned an unspecified error.

What to check for EVT_WDSMCS_E_NSREG_FAILURE

  • Read the detailed error information in the same event and preceding WDS server logs.
  • Validate namespace configuration, provider registration, server availability, and network policy together.
  • Retry only after preserving diagnostics because the underlying cause may be configuration or provider state.

Microsoft documentation on the Windows Deployment Services Multicast Application Protocol


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