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I'm sorry because my English is not very good. I'm working with an existing calculation architecture program. I use it to investigation because I'm doing a doctoral thesis. I need to make thousands of calculation changing the same kind of variables each time. It is like a routine. What I need is an application to simplify the process. The program uses another sub-programs in the calculation progress and you need to know this program sequence to indicate the new application the steps to follow. The idea is to create an application that changes the variables that you indicate, it´ll make the calculation automatically (maybe 300 or 500 each time) and it will get the final results. I think I know the file where you can change the variables, and where is the variables database but I don't know the calculation sequence of the program (I just intuit some things) I need to calculate, out of the main program, like if I calculate in msdos, using the sub-programes sequence and turning the results in a .txt or excel. Is this posible? If you think you can do it contact with me and I would try to explain you more about the project. You can download the reference program from [login to view URL] Thank you