Been using WinSCP for years and currently 4.1.2, haven't had any problems for a long, long time. But, recently am having erratic file copying from local to remote. Goes thru the motions; but file is not copied.
Problem is erratic. Doesn't matter if drag-and-drop or use the copy button. It can happen on one file in a dir and not another one. I can clear the problem by disconnecting and then reconnecting. I can first delete the file in the remote and then copying works OK. I can some times copy another file and then return to the one that wouldn't copy and then it does.