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RPC_E_FAULT
RPC_E_FAULT is a generic COM RPC call failure: the runtime could not complete the server invocation or return its result. It is less specific than RPC_E_SERVERFAULT, which reports that the server threw an exception.
How to investigate
- Collect the first related client and server error, including RPC and application logs.
- Check server availability, marshaling compatibility, and transport health.
- For state-changing calls, query the server before retrying because the method may have started.
Treat this as a boundary failure and preserve enough evidence to distinguish server execution from response delivery.
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