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FWP_E_INVALID_PARAMETER
FWP_E_INVALID_PARAMETER is a specific WFP validation result. For example, Microsoft documents it for invalid Unicode strings and for certain unsupported condition sets passed to FwpmIPsecTunnelAdd0.
How to diagnose it for FWP_E_INVALID_PARAMETER
- Log the full input structure, including nested conditions and strings, before the API call.
- Validate strings for printable, properly terminated Unicode content.
- For tunnel policy, verify the documented flags and permitted local/remote address conditions.
Diagnostic interpretation
This result has the HRESULT value 0x80320035. AllStat records the condition as “The parameter is incorrect.”.
Evidence to capture
- Capture any IErrorInfo text, activity identifier, event-log entry, and subsystem trace that mentions this result or the fwp / parameter operation.
- Preserve the first failure in the call chain; a later HRESULT can describe cleanup rather than the original fwp / parameter condition.
Retry and recovery
” has changed.
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