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STATUS_INVALID_PORT_HANDLE
The operation used the wrong kind of port handle
These statuses come from the native NT port message path used by low-level Windows IPC. For STATUS_INVALID_PORT_HANDLE, they are about port object attributes, connection handles, and message size constraints, not about TCP ports.
This status means the handle value exists in the process, but it is not the type of port handle required by the operation or it no longer represents a usable port endpoint.
For STATUS_INVALID_PORT_HANDLE, when debugging this class of status, keep the native API that failed, the port handle type, the connection state, the object attributes used to create or connect the port, and the message length that was sent.
What to inspect
- Trace where the handle was obtained.
- Check duplication and inheritance paths.
- Avoid using a client communication-port handle where a connection-port handle is required.
References for STATUS_INVALID_PORT_HANDLE
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