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Example: Reject duplicated file names in attachments
How to configure a validation for rejecting attachments with repeated file names?
Use Boolean validator with math, date-time or text-string terms with the following configuration:
Boolean expression is: count(toStringList(%{00071})) = count(distinct(toStringList(%{00071})))
Note that:
- %{00071} is field code for "Attachments"
Other examples of that function
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