Hello Stephane.

When the table field is empty, I would like to prevent the display of " / / : :". I would like the grid field to be empty.

If you do not need the column to be editable (if this grid is ReadOnly), you can use this as the column's controlsSource:

( IIF( NOT EMPTY( NVL( MyAlias.MyDateField, {/:} ) ), MDY( MyAlias.MyDateField ), '' ) )