HRESULT 0x8032000D (FWP_E_NO_TXN_IN

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Description:

The call must be made from within an explicit transaction.

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FWP_E_WRONG_SESSION	FWP_E_TXN_IN_PROGRESS

FWP_E_NO_TXN_IN_PROGRESS

FWP_E_NO_TXN_IN_PROGRESS means that this WFP API requires an explicit transaction, but the current engine session has none. It is not a general instruction to begin transactions around every failed API call: only the operation that requires explicit transactional context should be performed inside one.

Diagnose the call sequence

Log the exact WFP API, engine handle, transaction flag, and preceding transaction result.
Check that the code did not commit, abort, or close the engine handle before the dependent call.
Use one owner for the transaction scope; a session can have only one transaction in progress at a time.

Repair

Begin the appropriate read-only or read/write transaction, execute the intended cohesive sequence, then commit or abort it on every path. Avoid opening a transaction merely as a retry wrapper around unrelated network activity, because WFP transactions protect policy management state rather than packets already in flight.

Microsoft: WFP error codes · Microsoft: WFP transaction semantics · Microsoft: FwpmTransactionBegin0

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