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STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT
The filter links a callout to context data it cannot consume
STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT is more specific than a context problem at a layer. The filter can reach a callout action, but the raw context or provider context attached to that filter does not match the selected callout’s expected context semantics. The error is about a policy linkage, not evidence that the callout driver binary failed to load.
Trace the filter, callout, and context as a three-object relationship. A compatible layer is insufficient: the callout key and the context type must agree. Keep registration order visible as well, because a filter that references a callout should be installed only after the callout is registered with the engine.
What to inspect
- The filter action type, callout key, and target layer.
- The raw-context value or provider-context key attached by the filter.
- The callout registration and policy-install sequence.
- The expected context contract documented by the callout implementation.
References
- Microsoft: WFP error codes
- Microsoft: FWPM_ACTION0
- Microsoft: FwpmFilterAdd0 callout registration order
- Microsoft WFPSampler source
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