Forms need to get next record value in  tabular forms, update # on delete

the isusue
In a tabular form (multirecord)...when i enter + to add the first record , it should add 1 in this item 'order' and if i hit + again then it should enter 2 and so on....
where users would enter different records at once and save it .However if they were to delete a record in the middle ...
say record
1
2
3
4
5
6
and delete 2 and 3 then # 4 should be 2 and # 5 should be 3 and #6 would be 4 . if they are to add a new record then it should assign the next number which would be 5
what i have done is created a non database item in that block and made it a summary field with max
and in the when_new__record_instance trigger...i am doing somthing like
If block.item is NULL
THEN
block.item = block.non_database_item +1
end if
got this from a post here by Francois...
it is adding just 1 everytime i hit + to add a new record...when the item is null in the beginning. However if i save the first record then click + to add new record then it goes inseries like 2..3..4....
Any help would be appreicated . Thanks

HI,
Check following thread you may useful
Maximum create call for the VO

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