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UTC_E_FILTER_INVALID_FUNCTION_PARAMS
Separate cause from final symptom: filter function signature binding
The code UTC_E_FILTER_INVALID_FUNCTION_PARAMS (0x87C51051) belongs to scenario filter parser and evaluator, inside the Universal Telemetry Client/DiagTrack workflow. The first diagnostic step is to separate configuration, policy and runtime state. It identifies filter function signature binding and reports that the function exists, but argument count or argument types do not match any accepted signature; it does not by itself prove that all Windows diagnostic data collection is unavailable.
UTC filters are typed programs, not plain text searches. Parsing, command validation, name lookup, signature binding and evaluation are distinct phases. Capturing the normalized expression and inferred operand types is essential for a useful diagnosis.
High-value observations
| UTC diagnostic field | Value |
|---|---|
| Producing layer | scenario filter parser and evaluator |
| Owning state or object | filter function signature binding |
| Evidence to collect | function name, ordered arguments, inferred types, nullability, filter version and parser location |
| Narrow comparison | call the same function with a minimal known-valid signature, then add arguments one at a time |
| Do not confuse with | UTC_E_FILTER_INVALID_TYPE rejects an unsupported type even before a function signature can bind |
A focused experiment
- Associate this result with one request, one scenario version and one service process ID.
- Save function name, ordered arguments, inferred types, nullability, filter version and parser location and the first lower-level HRESULT if one exists.
- Change no policy, provider set or destination except for this test: call the same function with a minimal known-valid signature, then add arguments one at a time.
- Compare the produced artifacts and operational events, not only the top-level return value.
Nearby result: UTC_E_FILTER_INVALID_TYPE — rejects an unsupported type even before a function signature can bind.
Typed-filter note
Save the filter after variable substitution and type inference, not only the authoring XML. A visually plausible expression can still fail because the runtime command table, scope or operand types differ from the authoring tool. Test with one synthetic event whose fields and types are known exactly.
Recovery criteria
Convert operands explicitly and supply exactly the documented parameter list.
Technical references
- Microsoft Open Specifications: Windows error-code registry — reference for scenario filter parser and evaluator while interpreting this result.
- Microsoft: Universal Telemetry Client configuration diagnosis — reference for scenario filter parser and evaluator while interpreting it.
- Microsoft: Windows Event Log query schema
- Microsoft: Querying Windows Event Log
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