I am creating proProgram and in the input area, i have parameter "A". However, later i would like to limit this A value to certain range which i create using restricted range method. However, when i open the parameter box, i cannot tick the exisitng A to become restricted parameter. I have to go proprogram, delete parameter A, then delete A in parameter box, then recreate new parameter call A and check the restricted box. then only i am able to limit the A wihin the range value. I also notice that there are precedence depends on where we create the parameter.