Hi! For one simulation, I have 108 combinations of simulation conditions that I specify using macro variables (variations on n, effect size, correlation, etc). I usually just change the values of the macro variables manually for each condition.  I know it must be possible to automate this. I have my conditions in an Excel spreadsheet. Can I have SAS access that spreadsheet, find the values of the macro variables for a specific condition, run the simulation, then automatically find the next set of values for the macro variables? It would do this 108 times, going row by row in Excel to get the values for macro variables each time, and my simulation could be completed with just one click. Any tips/resources greatly appreciated. I have tackled this issue on and off for a couple years and usually just resort to my manual method to "save time". :smileysilly: ... View more