Hi ArunRaj R.....
Try the Below
/* Start */
if @transaction_type in ('A', 'U')
and @object_type in ('23','17','15','16','203','13','14')
begin
if exists(
--Sales Quotation
select DocEntry
from OQUT with (nolock)
where @object_type = '23'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(OWNERCODE,'') = ''
union all
--SO
select DocEntry
from ORDR with (nolock)
where @object_type = '17'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(OWNERCODE,'') = ''
union all
--DO
select DocEntry
from ODLN with (nolock)
where @object_type = '15'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(U_SO_TRANS_TYPE,'') = ''
union all
--Return
select DocEntry
from ORDN with (nolock)
where @object_type = '16'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(OWNERCODE,'') = ''
union all
--A/R DP
select DocEntry
from ODPI with (nolock)
where @object_type = '203'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(OWNERCODE,'') = ''
union all
--A/R Invoice
select DocEntry
from OINV with (nolock)
where @object_type = '13'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(OWNERCODE,'') = ''
union all
--A/R Credit Memo
select DocEntry
from ORIN with (nolock)
where @object_type = '14'
and @list_of_key_cols_tab_del = N'DocEntry'
and DocEntry = @list_of_cols_val_tab_del
and isnull(OWNERCODE,'') = ''
)
begin
set @error = -1
set @error_message = ' Owner code Type must be filled'
end
end
/* End */
Hope helpful 
Regards
Kennedy