A/P Invoice Vendor Ref Number Field updating after adding the Invoice Copy

Question

Hi All,
              I am able to change the Vendor Reference number in A/P Invoice Document after adding the Document.  I want to restrict this to happen. Plzz help how to do this????
Regards,
Sree.

Answer 1

1.The Modify Posted A/P Documents authorization refers to some fields only, e.g. the Due Date or Pay to address.
2. Additional authorization can be defined only for full forms, not for fields.
3. The SP Joseph suggests will refuse those modifications when the Vendor ref is empty.
To avoid modifying the Vendor ref you can use this code:
IF @Object_type = N'18' and @transaction_type = N'U'
BEGIN
declare @li int
set @li=
(select max(t.LogInstanc)
   from ADOC t
   where t.ObjType=18 and t.DocEntry=@list_of_cols_val_tab_del)
IF
   (select isnull(t.NumAtCard,'')
    from ADOC t
    where t.ObjType=18 and t.DocEntry=@list_of_cols_val_tab_del
      and t.LogInstanc=@li-1)
!=(select isnull(t.NumAtCard,'')
   from OPCH t
   where t.DocEntry=@list_of_cols_val_tab_del)
begin
  Set @error = 10
  Set @error_message = N'Vendor refernce not modifiable !'
end
END
Or if you want to allow modifying an unfilled reference, then this:
IF @Object_type = N'18' and @transaction_type = N'U'
BEGIN
declare @li int
declare @pref nvarchar(100)
set @li=
(select max(t.LogInstanc)
   from ADOC t
   where t.ObjType=18 and t.DocEntry=@list_of_cols_val_tab_del)
set @pref=
(select isnull(t.NumAtCard,'')
    from ADOC t
    where t.ObjType=18 and t.DocEntry=@list_of_cols_val_tab_del
      and t.LogInstanc=@li-1)
If @pref !='' and @pref !=
(select isnull(t.NumAtCard,'')
   from OPCH t
   where t.DocEntry=@list_of_cols_val_tab_del)
begin
  Set @error = 10
  Set @error_message = N'Filled vendor refernce not modifiable !'
end
END