This is a Message Board Post that is gatewayed to this mailing list. Author: sequentialboy Surnames: Classification: queries Message Board URL: http://boards.rootsweb.com/topics.software.ftmmac/170.1.1.1.1.1.2.1.1.1.1/mb.ashx Message Board Post: Babs, Before you delete your FTM tree and download it again from Ancestry: I tried deleting and downloading this weekend (18 - 20 May 2012) and I still can't sync. At least, I can't sync the largest tree, which is the one that matters. I have several trees. My main tree has about 6500 individuals, while another tree has 1500 and the remainder perhaps a few hundred each. I haven't been able to sucessfully sync my main tree at all for at least a week. Before then it would report a successful sync and then immediately crash. Changes synced up from FTM to Ancestry were unreliable but changes synced down were generally successful so I have been using FTM as a local back-up of Ancestry. I have been able to successfully sync some of the smaller trees. This weekend, I deleted my main tree then downloaded it again before making some changes so that it would sync. I have been using Activity Monitor on my Mac to observe FTM's behaviour during TreeSync. As you'd expect, there's a reasonable amount of disk and CPU activity while it's "analysing changes". With the smaller trees, network activity shows small sharp spikes during the download and upload parts of the process. With the largest tree, network activity shows frequent spikes during the download but then ramps up to around 120k per second and remains there for five minutes before that process ends abruptly (and the "TreeSync failed" message is shown in the interface). It looks like FTM is trying to upload an amount of data to Ancestry and there is either a timeout to release the process or there is a limit on the volume of data that can be uploaded. Or else, Ancestry could be responding to an error in the data and kicking the upload because of it: but no amount of compacting in FTM has yet identified and removed that error. Whatever, FTM seems to be waiting for an "all-clear" message from Ancestry before it commits whatever changes it has downloaded into the local tree but then drops those changes if that message isn't recieved. I can't sync up and I can't sync down, so FTM is useless to me. What size is your tree? As I say, I can sync with some of the smaller trees but not with the largest. Jonathan Important Note: The author of this message may not be subscribed to this list. If you would like to reply to them, please click on the Message Board URL link above and respond on the board.