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OSS_PER_DLL_NOT_LINKED
OSS_PER_DLL_NOT_LINKED (0x8009302B) is an OSS ASN.1 runtime result for Packed Encoding Rules codec DLL absent. The requested PER operation cannot start because the modular runtime lacks the component implementing aligned or unaligned Packed Encoding Rules. Because aligned versus unaligned PER selection 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 PER module loader status, then separate the encoded value from generated artifacts, call arguments, and the runtime package actually loaded by the process.
Interpretation at runtime
At the Packed Encoding Rules codec DLL absent 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 schema and generated code version; otherwise an outer certificate or security wrapper may hide the useful codec result behind a generic failure.
Diagnostic record
| Record | Diagnostic value |
|---|---|
| aligned versus unaligned PER selection | Locates the concrete message, allocation, module, or API boundary |
| PER module loader status | Separates payload-dependent behavior from build and process state |
| schema and generated code version | Makes the comparison reproducible without rewriting the original artifact |
Small experiments with high signal
- round-trip a minimal constrained integer
- compare bit length with an independent PER implementation
- verify alignment mode at both endpoints
Keep the original bytes or object graph unchanged while testing round-trip a minimal constrained integer. A change in PER module loader status after reload, plugin replacement, restart, or schema deployment is evidence about runtime state, not permission to discard the reproducer. When schema and generated code version points to one message, retain a cryptographic hash and the smallest safe sample instead of logging certificate, subscriber, credential, or private-key material.
Avoid the wrong workaround: the result
Falling back to BER changes the wire format completely and cannot preserve interoperability with a PER protocol.
Decision matrix
| Controlled observation | Conclusion it supports |
|---|---|
| round-trip a minimal constrained integer | A changed outcome isolates the first proposed control instead of a blind retry |
| aligned versus unaligned PER selection differs between success and failure | The difference localizes the Packed Encoding Rules codec DLL absent 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 aligned versus unaligned PER selection can expose sensitive content, a hash plus a bounded structural excerpt is safer than the complete payload. Use PER module loader status together with OSS module paths and versions logged once per process so packaging differences can be correlated without flooding normal diagnostics.
Proof of recovery: the result
Deploy PER support generated for the same schema and verify both boundary values and bit alignment. A recovery test built around round-trip a minimal constrained integer 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 aligned versus unaligned PER selection 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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