You have to escape the [.
See: https://winscp.net/eng/docs/file_mask#basic

If you are using WinSCP .NET assembly, you should use RemotePath.EscapeFileMask on all literal paths:
https://winscp.net/eng/docs/library_remotepath_escapefilemask

Hi,

In Visual Studio 2012.Net, i can't manage to download files with specific characters as '[' or ']'... I've tried with WinSCP 5.7 and sFTP protocol.

For all filenames containing these chars i have the message Script: No file matching '_fpswtlq3kgia6luaaacncn4paby_lggd-guid[fuuswvrztgkapqsaaaanpp0aaby_par3].wid' found.
I have no problem for other files.

Is there a workoaround for this trouble ?

Thanks in advance,
Patrick