NTSTATUS 0xC0020006 (RPC_NT_INVALID_STRING

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Description:

the UUID text supplied in an RPC binding or registration field is invalid.

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RPC_NT_INVALID_RPC_PROTSEQ	RPC_NT_INVALID_ENDPOINT_FORMAT

RPC_NT_INVALID_STRING_UUID

RPC_NT_INVALID_STRING_UUID is an NTSTATUS value used by the Windows RPC runtime. RPC uses UUID values to identify objects, interfaces and types. This status means a field expected to contain a UUID in string form could not be interpreted as a valid UUID. It is a representation error, not a statement that a valid UUID was looked up and found missing.

The important distinction is with RPC_NT_OBJECT_NOT_FOUND: an object-not-found result presumes a usable object UUID that has no matching registration, while RPC_NT_INVALID_STRING_UUID means the UUID text never reached that lookup stage.

The UUID text is not a valid RPC UUID representation

Record the UUID string before conversion and compare it with the interface or object UUID compiled into the client and server IDL artifacts.
Keep object UUID, interface UUID and manager-type UUID separate in diagnostics; they identify different RPC concepts.
Use UUID conversion APIs or generated constants rather than manually editing textual UUIDs.

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