Wing FTP Software

For many files (which were successfully transferred using FileZilla FTP Server) I am receiving an error on transfer. The common error between them all is '550 Can't access file, no file handle'. Here is one example:

[04] Wed, 27 Dec 2023 10:56:31 (0000053) 250 CWD command ok. "/FDSBackup/ZEUS-rbell/d_ray's files/FDS Health/VG/signforrelease/How to.com_files" is current directory.
[03] Wed, 27 Dec 2023 10:56:31 (0000053) PROT P
[04] Wed, 27 Dec 2023 10:56:31 (0000053) 200 Data channel will be encrypted.
[03] Wed, 27 Dec 2023 10:56:31 (0000053) PASV
[04] Wed, 27 Dec 2023 10:56:31 (0000053) 227 Entering Passive Mode (192,168,50,45,19,148)
[03] Wed, 27 Dec 2023 10:56:31 (0000053) STOR timeline.16b53cc33aaa562f8f41a495bf720289.js.download.2
[04] Wed, 27 Dec 2023 10:56:31 (0000053) 550 Can't access file, no file handle.

OK, it seems this is an issue between WingFTP and Filezilla. Filezilla will get stuck occasionally when uploading files via FTPS/FTPES protocol. Anyway, we will try to fix this issue in the next release of WingFTP.