Input compile getting unwanted error!

[Not Only]

enum myWeekDays {

               Sunday = 1, Monday = 10, Tuesday, Wednesday, Thursday, Friday, Saturday
              };

            input myWeekDays Day = Sunday, Day1 = Monday, Day2 = Tuesday; 

Error: Input dialog box doesn't open	Testing.mq5

Someone, please tell me why I'm getting such an error?

[Keith Watford]

Not Only:

You probably have your function inside another function.