Live-probed both against the local Historian 2020 (WCF):
- R1.3 GetServerTimeZoneAsync: Status.GetSystemTimeZoneName returns rc=0 with
an empty value under a real authenticated handle — a client-side stub in the
GetServerTime family. gRPC/2023R2-only. Reverted the implementation.
- R1.1 ExecuteSqlCommandAsync: Retrieval.ExeC returns native error type 4 /
code 51 (InvalidParameter); the contract-3 string-handle ops require an
unmapped native session/filter registration step (the StartTagQuery wall).
Adds an M1a re-classification note steering future work toward proven
uint-handle / already-wired ops (R1.4 GETHI next) over string-handle ops.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Joseph Doherty
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