HRESULT 0x80010010 (RPC_E_INVALID_PARAMETER): meaning and diagnosis

Status / error code:

Category:

Constant name:

Source:

Facility:

Operating System:

Description:

A COM call parameter cannot be marshaled because its value or declared type is invalid.

Previous	Next
RPC_E_INVALID_DATA	RPC_E_CANTCALLOUT_AGAIN

RPC_E_INVALID_PARAMETER

RPC_E_INVALID_PARAMETER means that a parameter could not be marshaled for the COM call. This differs from an application method rejecting a validly delivered argument: COM itself could not represent the parameter for transport.

What to inspect

Check nullability, array bounds, structure initialization, and pointer ownership rules in the interface contract.
Verify that IDL declarations match the actual C or C++ layout used by both sides.
For interface parameters, make sure the object supports a marshalable interface in the target context.

Correct the contract or call-site data before adding application-level retry logic.

Microsoft: COM documentation

Looking for a different code? Search another status or error code.