I had some bad luck with an Access 2016 file I was working on as a new user. I had the table set up and also created a query, a fairly complicated form, and a few reports. It was going along nicely! Then..... I was playing around with seeing how to add records to the existing table and ended up recopying all the existing rows yet again, which took the table from 14500 rows to 29000 rows. When I did this, the program said that it couldn't undo this operation because of low memory, but I thought it would be fine since I would not "save" the file and all would be back to normal. Not true. When I closed the file it did not give me an option to save, it just closed. So when I opened it again, all the double records were still there! A bit panicky I closed and right clicked on the file and was given the opportunity by windows properties to go back to a previous version from the day before. Eureka I thought, good to go. So I chose to do this. Then when I tried to open the file again, all I get is a message that says "Not A Valid Bookmark" and it never opens. All my work apparently down the tubes. Unless you guys can help a neophite some way? To add insult to injury, I also found after all this that my backup service iDrive had apparently been deleted off this computer at my work a month before by someone!! Can't win here, but hopefully someone has some way to fix the bookmark issue. Thanks very much in advance. Mark