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OSS_CANT_OPEN_TRACE_WINDOW
OSS_CANT_OPEN_TRACE_WINDOW (0x80093018) is an OSS ASN.1 runtime result for legacy trace window could not be created. The Windows-specific diagnostic trace window failed to open; the encode/decode operation may be secondary to an instrumentation setup problem. Because desktop/session identity and interactive availability is central to this condition, Microsoft’s HRESULT range and the OSS Nokalva return-code documentation should be read together. Start the investigation by recording trace flags and window handle inputs, then separate the encoded value from generated artifacts, call arguments, and the runtime package actually loaded by the process.
Similar names, different faults: OSS_CANT_OPEN_TRACE_WINDOW
This status does not establish that ASN.1 data is bad; it identifies failure in a legacy diagnostic presentation channel.
Where processing stopped
At the legacy trace window could not be created boundary, capture the first OSS function returning the value and note whether the operation was encode, decode, copy, compare, constraint validation, or trace setup. Preserve the selected PDU, encoding rules, and first Win32 error captured at creation time; otherwise an outer certificate or security wrapper may hide the useful codec result behind a generic failure.
Isolation sequence
- redirect diagnostics to a file or callback
- run under the same service/session account
- disable only tracing to prove codec behavior is otherwise unchanged
Facts that change the conclusion
| Record | Diagnostic value |
|---|---|
| desktop/session identity and interactive availability | Locates the concrete message, allocation, module, or API boundary |
| trace flags and window handle inputs | Separates payload-dependent behavior from build and process state |
| first Win32 error captured at creation time | Makes the comparison reproducible without rewriting the original artifact |
Keep the original bytes or object graph unchanged while testing redirect diagnostics to a file or callback. A change in trace flags and window handle inputs after reload, plugin replacement, restart, or schema deployment is evidence about runtime state, not permission to discard the reproducer. When first Win32 error captured at creation time points to one message, retain a cryptographic hash and the smallest safe sample instead of logging certificate, subscriber, credential, or private-key material.
Decision matrix
| Controlled observation | Conclusion it supports |
|---|---|
| redirect diagnostics to a file or callback | A changed outcome isolates the first proposed control instead of a blind retry |
| desktop/session identity and interactive availability differs between success and failure | The difference localizes the legacy trace window could not be created boundary before unrelated settings are changed |
| An independent decoder accepts the same artifact | Inspect generated schema, selected rules, ABI, and optional OSS modules before declaring the bytes invalid |
| A fresh control object changes the outcome | Investigate initialization, lifecycle, allocator ownership, configuration mutation, and concurrent access |
Instrumentation
Record the full 32-bit HRESULT and lower OSS return number together with operation direction, symbolic PDU, encoding rule, byte count, and generated-table identifier. Where desktop/session identity and interactive availability can expose sensitive content, a hash plus a bounded structural excerpt is safer than the complete payload. Use trace flags and window handle inputs together with OSS module paths and versions logged once per process so packaging differences can be correlated without flooding normal diagnostics.
Completion check: the result
Use a trace sink appropriate for services and noninteractive sessions, while preserving the underlying codec result separately. A recovery test built around redirect diagnostics to a file or callback should replay the same operation under the same schema and encoding rule, retain one deliberately invalid control, and verify ownership and cleanup after both outcomes. Success after an unexamined retry is not proof that desktop/session identity and interactive availability now satisfies the codec contract.
Technical references
- Microsoft: OSS ASN.1 HRESULT definitions
- OSS Nokalva: encoder/decoder return codes
- OSS Nokalva: runtime functions and control initialization
- Relevant ASN.1 specification or runtime detail
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