Hello.
Been fighting this all week, after the corrupt data files due to an old battery(s) in the UPS, I have a handful of stocks I track in RT 5.09 AMI with IB. On Friday morning 3 stocks started out with around 3 days of data (all others 8 days which in norm), at the end of the day (the 3) had a history of one day!! This is on two computers the same stocks. I do not have anything in the formula that saves or writes anywhere. What I do during the day is hit save every now and then or run the Automatic Analysis every 60 minutes or both. In help files under troubleshooting it talks about what to do under crash or hangup, but not "disappearing". Have tried re-do of installation of 5.09 and a fresh data base with all symbols re-entered. The two trading computers do not access the net but only through IB. So any thought any one? Thanks to Barry and Brian_Z on their reply a week ago at the start of this problem. Jerry
