Copying file 'D:\MYDOCS\myfile.rar' fatally failed.
Network error: Connection reset by peer
Then the program crashes. Here's the last few lines of the log:
. SCP remote side confirmation (0)
. Sending BINARY data (first block)
. Network error: Connection reset by peer
* (ESshFatal) Copying files to remote side failed.
* (EAccessViolation) EAccessViolation
This is odd because I was using winSCP for a long while with no problems to this same host.