Reading Your Transfer Logs

Once you're viewing your log files, here's a guide to getting the most out of them.

NOTE: The following is a basic walkthrough to understanding what's going on in your log files. We definitely recommend sending an email to us at for more insight and help with issues!

What Am I Looking At?

  • Status: This will tell you whether an action was a success or a failure.
  • Size: This will tell you the file size in bytes, or that it's a folder being created/operated on.
  • Name: This column will state the name of the file or folder being acted upon, or will list the general action performed.
  • Additional Info: This will list more information about what's going on with the particular action performed. You can find out more about those below.

Common Error Messages & Additional Info

Message Definition
Failed to download file successfully This is an issue with the Source Connector.
Failed to upload file successfully This is an issue with the Destination Connector.
Unknown error of type 400 This is a "bad request" error - it could be a problem with the Source (File Download) or Destination (File Upload). Typically, this means that something has changed client-side or server-side and could be resolved by the next time you run the transfer.
Unknown error of type 404 This is a "server not found" error. Typically, this means that the Source (File Download) or Destination (File Upload) server is down or experiencing a temporary outage.
Auth failure: attempt to renew authentication successful Authorization is failing either on the Source (File Download) or Destination (File Upload) Connector.
Backoff used: # Usually seen after an action listed as 'throttle' - this means we've made too many requests of that Connector, and must wait before trying whatever action we were trying to complete again.
Folder Already Exists We went to create the folder, but we've already created it in a prior transfer, or it already exists in the destination.
Skipping because of incremental Not an error by definition - it's just our incremental process at work.