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OSS_NULL_TBL
OSS_NULL_TBL (0x80093014) is an OSS ASN.1 runtime result for missing encoder or decoder control table. The OssControl object has no control-table pointer because initialization was skipped, failed, or the object was reset or overwritten. Because return value from ossinit or its language equivalent 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 control object address at init and use, then separate the encoded value from generated artifacts, call arguments, and the runtime package actually loaded by the process.
Where processing stopped
At the missing encoder or decoder control table 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 generated table symbol supplied to initialization; otherwise an outer certificate or security wrapper may hide the useful codec result behind a generic failure.
Isolation sequence
- fail fast if initialization is not successful
- create and use the object in one narrow scope
- test accidental zero-initialization after setup
Facts that change the conclusion
| Record | Diagnostic value |
|---|---|
| return value from ossinit or its language equivalent | Locates the concrete message, allocation, module, or API boundary |
| control object address at init and use | Separates payload-dependent behavior from build and process state |
| generated table symbol supplied to initialization | Makes the comparison reproducible without rewriting the original artifact |
Similar names, different faults: the result
BAD_TABLE rejects damaged table content; NULL_TBL means there is no table to inspect at all.
Keep the original bytes or object graph unchanged while testing fail fast if initialization is not successful. A change in control object address at init and use after reload, plugin replacement, restart, or schema deployment is evidence about runtime state, not permission to discard the reproducer. When generated table symbol supplied to initialization points to one message, retain a cryptographic hash and the smallest safe sample instead of logging certificate, subscriber, credential, or private-key material.
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 return value from ossinit or its language equivalent can expose sensitive content, a hash plus a bounded structural excerpt is safer than the complete payload. Use control object address at init and use together with OSS module paths and versions logged once per process so packaging differences can be correlated without flooding normal diagnostics.
Decision matrix
| Controlled observation | Conclusion it supports |
|---|---|
| fail fast if initialization is not successful | A changed outcome isolates the first proposed control instead of a blind retry |
| return value from ossinit or its language equivalent differs between success and failure | The difference localizes the missing encoder or decoder control table 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 |
Completion check: the result
Make successful runtime initialization a prerequisite and prevent later clearing or shallow copying of the control object. A recovery test built around fail fast if initialization is not successful 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 return value from ossinit or its language equivalent 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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