I've using the .NET assembly in a PowerShell script to transfer a batch of files (1 - 4 of them at a time, generally) ranging in size from 10 KB to 500 KB. The script runs 3 times per day. Because of problems we were having the the transfers timing out, I turned off the 'Optimize connection buffer size', which seemed to help.
We've been having a run of interrupted transmissions for the past week. My hunch is that it's a problem with the connection on the other end. Would you look at the attached debug log and see what you think?
debug_20170906_060301.log (104.28 KB, Private file)