Warning if QR or Barcode is scanned again from the external CSV file

[Andrea_Martin]

Hi @Manne_Munikumar

In general yes, it is possible to recall a single value from a repeat group.
See e.g. this thread: Repeat answer - #5 by Andrea_Martin

Also, I've found this thread which seems quite similar to your case.

Warning if QR-/Barcode is scanned again

If using a repeat group you might be able to do something with count() and indexed-repeat() functions. I suggest searching the forum with some combination of "value", "indexed-repeat", "previous answer", and "count" to see how other people have used these. If you have a question/line for each barcode scan (not a repeat group), then I was wondering if it was possible to use calculate questions to combine the values from the previous barcode scans and then use a regrex as constraint to look for t…

But I'm not sure the case was resolved.

Some workarounds you might want to explore by combining choice lists and filters.

Alternatively, you could consider developing a simple external app, like the approach mentioned in this post by @Xiphware

Need assistance to create an incrementing ID field

As @Andrea_Martin states, in Collect each submission is independent so its not (currently) possible to maintain external state between submissions, which would be required for something like an autoincrementing counter. However, it is possible to use an external app to accomplish this (!), which Collect can then query via an external integer widget. There's an available counter app designed for just this purpose, along with instructions how to use it in a form, described here: https://github.co…

I hope this helps!

Best,
Andrea