I would like to obtain a nationally representative sample from a (non representative) survey data set thereby using every individual from the given survey data set. To do so I am creating a 100% random sample with the corresponding weights by using gsample 100 [aw=weight], percent. I am not expanding the data by using the weights first and then drawing a random sample with other commands (e.g. sample) since the data set that I start with is already quite big. The problem is that I am not getting the same sample every time I draw the sample. I tried to set the seed at various positions, at the beginning of the do-file or right before the gsample command. I also tried to sort the data according to a unique identifier right before drawing the sample and also setting the seed right before that. But nothing has helped to have the same random sample when I draw the sample again and again. Any help would be appreciated. I cannot post my code before using gsample command since it is quite long, but some commands involve sorting the data.