Why happen Topic error ; message id is not an integer

[Supote Songthammawat]

Dear sir,
 I want to know what happen of text error below. And I want to know how 
to solve this problem.

         executing at 10:18:21 AM
Type    cancel: message id is not an integer
Object    NextWeek
Line   
Hint    button id 2691 of card id 1002 of stack "Calendar Schedule111" 
of stack "E:/schedule fill day month label of groupweek.rev"


Thank you very much.
Best Regard
Supote