Pop up list question in Marionette Posted June 27 You are on the right track and very close. If you want the output value to be a symbol name, it needs to be a string. In order to create a string in your script, you must use quotation marks. Assuming that HR4 is the symbol name, you simply have to put quotation marks around it to make it a string. if input == 0: self.Params.output.value = 'HR4' if input == 1: self.Params.output.value = 'HR5' if input == 2: self.Params.output.value = 'K4' if input == 3: self.Params.output.value = 'K5'