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FWP_E_INVALID_WEIGHT
FWP_E_INVALID_WEIGHT means that the filter priority value is not valid. In WFP, weights affect the order in which filters are evaluated, so guessing a large numeric value merely to outrank another rule is both unreliable and capable of changing a security policy unexpectedly.
Understand the supplied form
The filter weight is an FWP_VALUE0. Microsoft documents supported forms including an explicit 64-bit weight, a range index, and FWP_EMPTY for automatic assignment based on filter conditions. The correct representation matters as much as the numeric value.
Recommended repair
- Verify that the declared value type matches the intended weight strategy.
- Use automatic weighting when the policy does not require a strict, documented priority relation.
- When explicit precedence is required, define it inside the product’s own sublayer and test arbitration with the complete rule set.
Microsoft: WFP error codes · Microsoft: FWPM_FILTER0 weight forms · Microsoft: use a product-owned sublayer
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