[QUOTE=NiranV Dean;1552947@Shrike , i guess you and all others are aware of Problems LL had and still seems to have sometimes , i havnt encountered this bug yet , but as Da5id already noticed , those warnings clearly say that the session <UUID> does not exist , that sounds like LL Problems[/QUOTE]
The issue is that when groupchat screws up (a LL problem, as you say) the viewer doesnt react gracefully. The warning for "session doesnt exist" should trigger a cleanup action on that session, resetting it to the same state as if you'd never interacted with that group since you logged in. If session <uuid> doesnt exist, forget everything about that session because it aint there for you. Get rid of the IM tab, eliminate the chicklet, go back to the state right before the message that triggered the warning came in. That way when you get a new incoming message from the grp you make a new attempt to establish the session and maybe that one works - instead of the group being totally hosed until you relog and reset the session data that way. This bug does not exist in the official viewer - when I see those warnings in my log for the official viewer I get the popup saying "could not establish session with... " and can close the group and retry.