1. Make sure the location of the EXE also contains the ECGridOSMailboxIO.dll. config File, this contains the ECGridOS Host URL.
  2.  Make sure you can access https://os.ecgrid.io/v4.1/prod/ECGridOS.asmx/ and it is not blocked.
  3. If the Run location is a network drive, try running from a local directory for everything. (Run location and File location.)
  4. Find out where the error is occurring, You should see the Build and Copywrite info right away, then "ECGridOS [Version number]", then ECGridOS call: ParcelInBox(), for each file Downloading:, ParcelID, etc. Then Writing File to Path ...., then  Download Complete.
    1. If you don't see the ECGridOS Version then you are having an issue connecting to ECGridOS. Check to see if the config file is missing or firewall is blocking the connection.
    2. If you don't see Download Complete then you are having an issue writing to the Inbox path. Check for permission issues for on the application.