Changes to subscriptions in SV 5.1 FP4 Rev E
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As far as I can tell, no restrictions have been implemented.
Has flat subscription handler (DCSA020) in controller stalled? Then most items with 20.000 ms would fail as well...
Any system message at RTA or controller?
Please inject some more details (object type, AC450 revision, etc) and I'll have it checked next week.