The 2026-07 integration sweep flagged the Modbus non-standard profiles as
8F/5F/3F/8F and guessed 'pymodbus 4.x drift'. Re-investigation shows that was
wrong on both counts:
- The image runs the PINNED pymodbus 3.13.0 (verified via import pymodbus;
__version__). The '...removed in v4' log is 3.13.0's forward-deprecation
warning, misread as running 4.x.
- The failures were a fixture-cycling artifact: each profile is a separate
profile-gated compose service sharing :5020, and a plain 'docker compose down'
(no --profile) does NOT stop the running profile container. It kept holding
:5020; the next '--profile up' container silently failed to bind (compose
still says 'Started'), so every later profile run hit the STALE sim. Proven by
a raw Modbus probe: the 'mitsubishi' sim served DL205's 0xCAFE at HR0.
After force-removing all modbus containers and bringing up each profile cleanly
(verifying it actually published :5020), all four pass: dl205 16/16,
mitsubishi 13/13, s7_1500 10/10, exception_injection 17/17. No OtOpcUa or test
code change needed.
Added a profile-cycling gotcha + reliable-cycle recipe to Docker/README.md and
corrected the sweep record. Integration-sweep follow-up #2.
Joseph Doherty