For example in one index I have two items separated by a comma.
Index  = [a,b]
I want to get the items a and b separately. Is that possible?
Can you do this via using Get an Item from a Dictionary: http://help.nintex.com/en-US/O365/Default.htm#cshid=1066
if you get the item at index 0 from your initial collection, and output it to a new collection variable, I believe you will be able to work with those items as a collection, then use the Count Items in Collection on that 2nd variable (and continue to work with hte items inside).
I will try that solution. Thank you, Callum!
Retrieving data ...