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On Fri, Mar 4, 2016 at 3:13 PM, John Montgomery <> wrote:

Thank you to everyone who replied to my query, A01, A02 etc works, I am
very thankful for that. Now the problem to prevent duplication, I have
tried several ways but obviously what I am doing is incorrect as it doesn't

Hello John. I am thinking that you are seeing duplicate grave numbers? If
this is correct then I suggest creating an index for the grave number
column and selecting the option that the index be unique.

That constraint, unique, will prevent duplicate entries. It will also
prevent successfully creating and saving the index as long as there are
duplicates in the grave number column.

So first make sure there are no duplicate grave numbers in your table (that
includes grave numbers that have not been entered, e.g. blanks). Then
create the grave number index being certain to select the unique property
for the index. Save the change and it will no longer be possible to save a
record with duplicate grave numbers.

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