LIST or NLST commands behavior\reply if file not exists

[Vlad]

Most FTP servers do not return an error for commands

LIST file.ext

or

NLST file.ext

if the file not exists.
Reply of FileZilla server is:

200 Port command successful
550 Directory not found

Reply of SERV-U FTP server for example is:

200 PORT Command successful.
150 Opening ASCII mode data connection for /bin/ls.
226 Transfer complete.

Is there a possibility to change the server's response and did not return an error?
If you can not make changes to the future version, can you to recommend changes of code to implement this behavior?

Thank you