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UTC_E_SCENARIODEF_NOT_FOUND
Separate cause from final symptom: scenario-definition lookup
UTC_E_SCENARIODEF_NOT_FOUND (0x87C51005) is a Universal Telemetry Client result from the DiagTrack scenario-definition processing layer for this HRESULT. The first diagnostic step is to separate configuration, policy and runtime state for this HRESULT. Here the relevant owner is scenario-definition lookup: the requested scenario identifier resolved to no installed or loaded definition for this HRESULT. This is narrower than a generic failure of Connected User Experiences and Telemetry for this HRESULT.
DiagTrack scenarios are configuration-driven state machines. A scenario definition, its diagnostic rules, referenced profiles, triggers and action graph must all come from a compatible configuration generation for this HRESULT. Mixing authoring files or package versions can make an otherwise valid identifier unusable for this HRESULT. Record the configuration package or scenario generation together with the Windows build; otherwise a repaired file can be tested against a stale in-memory graph and appear to fail for the same reason for this HRESULT.
High-value observations
| UTC diagnostic field | Value |
|---|---|
| Producing layer | DiagTrack scenario-definition processing |
| Owning state or object | scenario-definition lookup |
| Decisive evidence | scenario name or ID, configuration package/version, search locations, load events and caller request |
| Narrow comparison | query a known installed scenario through the same API and compare lookup diagnostics |
| Do not confuse with | UTC_E_TRACEPROFILE_NOT_FOUND applies to a referenced trace profile inside or beside a scenario |
The AllStat message names the immediate condition as “Requested scenario definition cannot be found” for this HRESULT. In practice, the useful extension is to ask whether the request was rejected before any side effect, after partial setup, or during cleanup for this HRESULT. Verify the existence and ownership of the expected output—session, directory, process, result object or emitted event—rather than assuming the message describes the final system state for this HRESULT.
A focused experiment
- Freeze the failing scenario package, caller inputs and UTC service lifetime that produced this result.
- Collect the high-value state: scenario name or ID, configuration package/version, search locations, load events and caller request for this HRESULT.
- Use a passing control on the same Windows build, then query a known installed scenario through the same API and compare lookup diagnostics for this HRESULT.
- Repeat once after normal teardown to prove the result is not caused by a stale handle or leftover run state for this HRESULT.
The most informative neighbor is UTC_E_TRACEPROFILE_NOT_FOUND. The distinction is concrete: UTC_E_TRACEPROFILE_NOT_FOUND applies to a referenced trace profile inside or beside a scenario for this HRESULT. Keeping both symbolic names in logs prevents a broad “DiagTrack error” bucket from hiding whether the failure occurred during parsing, authorization, resource acquisition, execution or teardown for this HRESULT.
Configuration-generation check
Hash the scenario, rules and referenced profile files used for this HRESULT, and record the UTC process start time. If files changed after the process loaded them, restart only after preserving the prior generation so the comparison remains auditable for this HRESULT.
Recovery criteria
Deploy or select the correct scenario definition; do not create an empty file under the missing name for this HRESULT. Apply that change only to the owning boundary for this HRESULT. A successful repair must make the controlled case cross this boundary while retaining the intended policy, trace providers, destination and security context for this HRESULT.
Restarting Windows, clearing every ETL file or disabling diagnostic policy is not a justified first response to this result. Those actions destroy evidence and can change several independent UTC gates at once for this HRESULT.
- the same request now produces its documented success or nonfatal status without a second hidden retry
- the operational log shows one coherent request lifetime and no orphaned action, timer, process or trace session
- teardown followed by a second run does not reuse stale state or recreate scenario-definition lookup
- the nearby condition remains distinguishable: UTC_E_TRACEPROFILE_NOT_FOUND applies to a referenced trace profile inside or beside a scenario
Technical references
- Microsoft Open Specifications: Windows error-code registry — reference for DiagTrack scenario-definition processing while interpreting this result.
- Microsoft: Universal Telemetry Client configuration diagnosis — reference for DiagTrack scenario-definition processing while interpreting this result.
- Microsoft: UniversalTelemetryClient operational-log guidance — reference for DiagTrack scenario-definition processing while interpreting it.
- Microsoft: Windows Event Log query schema
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