Setting this Property is not necessary. Daily Grids can always be split
This message occurs if you try to set the "Allow Grid Split" property for an Insert related to a DiaryGridLine containing a daily template. This message tells you that daily grids can always be split, and that the value of this property will be ignored.
If you specifically do not want the grid to be split, you can :
•Set the Template structure to weekly, if the grid contains a multiple of 7 days.
•If not, make sure the insertion dates of the Insert ScriptLine fall on the appropriate dates, to avoid splitting the grid.
For more details, see Choosing the Right GridTemplate Structure).