Hi Shmuel, I'm using SAS Studio, University Edition online. My computer is a Mac, operating OS X. I saved my datasets online, under my user name, as sas files. I still have the original datasets in Excel, but all of the coding was of course in the SAS files, which just disappeared from one day to the next. I wonder how this could be, or if there is any back-up that may exist of them somewhere? Thanks for any help! Ivan
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