What does NTSTATUS 0xC0020051 (RPC_NT_BINDING_INCOMPLETE) mean?

 
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RPC_NT_CALL_CANCELLED RPC_NT_COMM_FAILURE

RPC_NT_BINDING_INCOMPLETE

Incomplete RPC binding handle

RPC_NT_BINDING_INCOMPLETE belongs to the Windows RPC runtime NTSTATUS facility. For RPC_NT_BINDING_INCOMPLETE, mS-RPCE extends the DCE/RPC model: generated stubs marshal parameters, the runtime binds to an endpoint and protocol sequence, and security or transport failures can be returned as RPC facility status values.

This status points to a binding handle that does not contain enough information to make the requested call. A binding may be syntactically valid yet still incomplete for the chosen operation.

Look at the full binding state: protocol sequence, network address, endpoint, object UUID, options, and authentication information. It often appears after manual binding construction, partial string-binding parsing, or missing endpoint resolution.

What to check for RPC_NT_BINDING_INCOMPLETE

  • Convert the binding handle back to a string binding and inspect the missing fields.
  • If the endpoint is dynamic, confirm that endpoint mapper resolution was performed before the call.
  • If authentication is required, verify that credentials and security quality-of-service were applied to the binding.

References for RPC_NT_BINDING_INCOMPLETE


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