Thanks for your response, but I do have another question.
I tried your suggestion and I'm getting an error.
"Infor LN Configuration not found for Company '408', Accounting Entity '' and Location ''", so it seems like it's not picking up the other ID's.
I added the 'Accounting Entity' and Location in the fields section of the file template and the incoming text file.
I must be missing something. Do you have any other suggestions?