SWCarson replied to TheBum's topic in Retrospect 6: Desktop, Workgroup and Server for Mac OS XJust in case there is a pattern... I am getting: Scanning incomplete, error 515 (Piton protocol violation) This is happening when I attempt to back up my wife's eMac which has client 6.0.110. I'm running Retrospect 6.0.212. We are both on MacOS X 10.4.1. There has been one successful backup since being on 10.4.1. I have not tried uninstalling the client and re-installing using Configure:Clients so that is what I want to try next. Previous comments in this thread do not leave me feeling optimistic that this will resolve the problem though.