application crashes when remove expression in straight table

[#1]

Hi,

my application crashes when trying to remove one expression column using straightTable.removeExpression() method. Hope someone would help me on this issue!

Here is my code in C#:

foreach (QlikView.StraightTableBox table in ((IEnumerable)sheet.GetStraightTableBoxes()))

{

        table.RemoveExpression(1);

}

Any ideas?  I  use the same way to remove expression columns on pivot table, it works well.

Thanks!