Hi Gaurav,
Thanks for the reply and yes the situation was becoming strange since we where unable to update the licence dongle while the system was running (the lock effect via the Sentinel Server Service ) and once the apps updating the dongle was close the server was not reading the key right after (lock effect again).
The approach on our end was to use the direct access to the Serial Dongle (since Borland C++ Builder 5.0). The default behavior (long time ago, I agree) was the direct access. The Hardware change, the system change, the drivers change but not our code!
Now we decide to continue with RNBO_STANDALONE and SP_TERM_SERV_CHECK_OFF. Everything is back to normal. No more cross reading between servers dongles nor Lock Effect.
Best regards
Olivier