@mbaer​ Can you use StringConcatenator? Or in AttributeCreator/AttributeManager the Text Editor

Thank you for the reply. But that will not work because I need each user name to be a different entry in the list. All those option create a list of lists. I am passing it to a HTTPCaller as part of the url so each one needs to be in one list separately.

Can you elaborate a bit? Do you have a sample of your data?

Use list builder, add all the attribute which has names. then print or write to a text file or excel.

I have attached one fmw file. which will print names in fme log window

name1, name2, name3, etc...

I can not share the data but the format is the same as the attached table.

So there are multiple attributes that have different user ids in them and I need a single list that can be the input for the HTTPCaller that will return the full names of those users.