Hello everybody, I should assign some input values (constants, file paths) to an IDL program from an external file, without modifying any part of the original code. In other words, I have a .txt file containing my input and a "black box" program, I just know what it needs to work. I think I could try with a script, a .pro batch file, but I can't figure it out. Does anybody has any good idea? Thanks for your help, Giuseppe