Sorry, me as a newbie was confused with all the possibilities - generated a sript for ftp instead of sftp and wanted it to repair with simply replacing the keyword. After a new generate all works fine. Thank you for reading.
Before posting, please read how to report bug or request support effectively.
Bug reports without an attached log file are usually useless.
"C:\Program Files (x86)\WinSCP\WinSCP.exe" /log="D:\WinSCP.log" /ini=nul /script="D:\Scripts\ftp_AR.txt"
echo "Errorlevel" %Errorlevel%