FileZilla fails to create a file in Windows that was created on a Mac

[Caravaggio]

Following error is displayed in FileZilla while download a file:

Error: Failed to open "X:\folder\file.ext" for writing
Error: File transfer failed

The error is actually from Windows 10 because it cannot create the foreign character of the Mac computer.

So you should check the filename for Mac characters and either change the error message or prompt the user to automatically change the characters in the file so it can be downloaded.

[Caravaggio]

Sorry it was not the character in this case (but I remember it happened once).

The download path exceeded the maximum allowed length in Windows.

[Tim Kosse]

It is an unfixable issue, there are all sorts of varying limitations on maximum possible filename lengths. Only way to find out is to try creating the file and see if it succeeds or fails.