I have two grids in different forms apparently similar. Both grids have a column with a date value. In the first the date is shown in the correct format in the other not.... Can someone help me to understand why ?

do your forms run in a private datasession?

Yes and in column's format i have "D"

did you check any set('date') change in this form?

You can set a conditional breakpoint: stop when set('date') changes