Thanks for the log. I was not able to identify the problem.
I have sent you an email with a debug version of WinSCP to the address you have used to register on this forum.

Hi, any news about problem? Thanks

Yes. In attachment. Thanks.

Can you post a complete log, including the part replaced with "....FOLLOW LIST OF FILES......"?

Hi, I have a problem in dowload file from a Unix system with z/OS FTP Server.
All file that start with letter "d" are considered as directory. Other file none.
Same problem arise if I download same file by WinSCP command line.
If I rename file with other letter the download is ok.

Where is my error?
Thanks.