You just have to retrieve the invoices (via a retrieve action). This will give you a list.
Then you have to loop through that list, and make a retrieve of the invoiceLines (via a retrieve by association action).
You can do this:
Or without using a DS:
What exactly would you like to do with the lists?
Thank you for your replies. This is what i did exactly, the microflow, but was unable to put the full result in a list object (List into list). I need to export the data
Miraculously, I was able to do it without looping. The following worked
The whole data is now in Variable_2