microflow: delete empty records from list

hi! needed a little guidance: using the following microflow, i pull an attribute from a list in one entity and add it to another. not all rows in my creditMemo entity contain invoice numbers, but it is pulling in all rows and creating objects for empty invoice numbers. how do i delete the empty rows in my microflow? i tried to union upon itself but that method did not work.  
1 answers

Hi Corina,

If I understand correctly you simply want to delete the row objects that have empty invoice numbers. To do this use a from data base retrieve with an xpath that only retrieves empty invoice numbers. Then simply delete the retrieved list.