| Previous | Next |
| FWP_E_INCOMPATIBLE_TXN | FWP_E_NET_EVENTS_DISABLED |
FWP_E_TIMEOUT
FWP_E_TIMEOUT means that WFP timed out while waiting to acquire its transaction lock. It can occur even when an application did not explicitly begin a transaction, because WFP performs most management calls inside implicit transactions.
Do not confuse it with a network timeout
The affected path is policy management inside the Base Filtering Engine, not a TCP connection, DNS query, or remote server response. The immediate diagnostic target is concurrent filter-engine activity, transaction scope, and the configured session wait time.
Practical handling
- Log the API call and duration, then retry only idempotent operations with a bounded backoff.
- Keep explicit transactions short and avoid holding them while doing unrelated I/O, UI work, or slow configuration discovery.
- Microsoft recommends either handling transaction timeouts gracefully or using an appropriate session transaction wait policy where that is safe for the application.
Microsoft: WFP error codes · Microsoft: transaction timeout guidance · Microsoft: implicit and explicit transactions
Looking for a different code? Search another status or error code.