Thanks Martin. I removed the TAB before the exit command and now it is working both from the command line and from Windows task scheduler.
exitcommand. But even that way, it works for me.
/log=path_to_log_filecommand-line argument. Submit the log with your post as an attachment. Note that passwords and passphrases not stored in the log. You may want to remove other data you consider sensitive though, such as host names, IP addresses, account names or file names (unless they are relevant to the problem). If you do not want to post the log publicly, you can mark the attachment as private.
...Download" ^, what got lost when posting the code on the forum.