Change System Column

Hi All.
I am trying to change caption of a column and to put it like noneditable a column of the system.
The changes are made without error, but they are not updated in screen.
My code is:
oMatrix = oForm.Items.Item(38).Specific
With oMatrix.Columns.Item("11")
.TitleObject.Caption = "Cantidad Total"
.Editable = False
End With
oForm.Update()
The form is sales invoice.
Thanks

Hi Jose!
unfortunately you can't do that.
you can find extra info in UI help, topic Restrictions.
citation from UI help:
Columns Collection -> Remove Method (Columns)
Removes a column in run time.
Restricted on system forms. You cannot remove a column from the collection.
i'm not quite sure, but try just to set your column invisible by
oMatrix.Columns.Item("myCol").Visible = false
Hope it helps..

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