Windows error 1700 (RPC_S_INVALID_STRING

Status / error code:		Category:

Constant name:
Source:	Operating System:
Description: The string binding is invalid.

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ERROR_CROSS_PARTITION_VIOLATION	RPC_S_WRONG_KIND_OF_BINDING

RPC_S_INVALID_STRING_BINDING

RPC_S_INVALID_STRING_BINDING means that RPC could not parse a string binding into its required parts. A string binding describes how to reach an RPC server; it is not a general URL.

What the binding contains

Its canonical form is ObjectUUID@ProtocolSequence:NetworkAddress[Endpoint,Option]. Depending on the protocol sequence, some parts are optional, but delimiters and the value placed in each part must still follow the RPC syntax.

What to check

Log the complete binding string before it is passed to RpcBindingFromStringBinding, after removing any secrets.
Build bindings with RpcStringBindingCompose instead of concatenating pieces by hand.
Verify that a hostname, endpoint and protocol sequence have not been swapped or copied from a different transport.

Microsoft: String Binding · RpcStringBindingCompose

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