First timer here

I am hoping I may be able to get some advice. I have set up a flow for a client who drops a pdf through their connect droplet containing order Numb data etc. This then sits in a checkpoint and our CSR then uses the menu and adds a WT number etc and pushes forward into the flow. That part works ok however i am having trouble getting the WT number to appear in the report. At the moment it is appearing as undefined on the report.
Sorry if this seems like a silly question I am quite new at setting flows etc any help advice anyone could give would be very much appreciated.
Cheers
Em
