When you export invoices DE-P-E, whether it is invoices or acknowledgements, two files seem to be written, no matter what I do.  (DBASHIP.OUT and DBASO.OUT)  I always have "create one file per invoice/SO number" as YES, so that I get a Sxxxx.OUT or Ixxxx.out file with the data in them.  The two files noted above always have 0 bytes. I'm not sure what the selections in Enter Customer EDI info do.  I have advance shipping notices set to N
 
It isn't causing major headaches, it would just be nice not to have those extraneous files sitting around.