Thanks very much Kenneth.
Unfortunately this does not result in an aliquot sequence number for me as it seems to for you. Neither for the closed nor the active aliquots.
May I ask, how is aliquot sequence useful to you in the context of closed specimens? I ask since closing the specimen/aliquot registers it as a disposal and removes its stored location at which point I would not really need to routinely track it.
What I thought the field was meant to be, and as it was explained to me at some point by Krishagni, was a way to list only one aliquot per patient/collection rather than all redundant aliquots (or at least that was my interpretation).
Many thanks again Kenneth