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...at directory ( system command ) I have 2 questions: I want the name of the directory to be unique and I am going to generate them by dir.create ( tell me if there is a better way ), so In the name which will be created, I want to add X, Y, so all the files generated at each inner loop and in next iterationsbe unique. How I can add X and Y to the file name? and the second question is general comments on the script structure itself. Thank you so much ( IN ADVANCE ) Cheers [[alternative HTML version deleted]]