Session locking log file and not Disposing

The script works OK in a patch file but as soon as i put it in a schedule task and pipe the output into a log folder it locks the log file and the process never closes. Actually i don't think these processes ever go away.

But anyway can i get these processes to close and how can it to pipe the output ">" into a log file so i can easily debug if there is an error the night before?

Would this FAQ help you?
https://winscp.net/eng/docs/faq_scheduler