I'm trying to create a very simple program to compare two files (based on an ID variable)--the files are getting too big for Excel. I've loaded two CSV files in a data inbox. I can import either one individually with no problem. However, when I try to import both upon load I'm told the second doesn't exist. Below is the code for the first file. The second is exactly the same exept it has "File2_temp." I cannot find an existing thread on this. Is there a command I need to use? I tried 'noconcatenate' but that didn't make any difference.