Requested action not taken. Concatenated Get in Deflated mod (wodFtpDLX / wodFtpDLX.NET)

by Steve Haney, Wednesday, May 23, 2018, 22:31 (2164 days ago)

For a specific FTP server that we download files from we started to get an error a few days ago:

Requested action not taken. Concatenated Get in Deflated mode is not supported.

The full stack is:

An exception occurred while trying to download files from: /outgoing
Message: Requested action not taken. Concatenated Get in Deflated mode is not supported
Source: WeOnlyDo.Client.FTP
at WeOnlyDo.Protocols.FTP._GetFile()
at WeOnlyDo.Client.FtpDLX.GetFile(String LocalPath, String RemotePath)

The Ftp server is using FTP protocol on port 21. The code calling GetFile is pretty simple. This has worked for over a year without issues and I'm trying to determine if its the host FTP server that might've changed something. I don't even see where deflated mode is an option.

Code calling GetFile...

log.DebugFormat("Downloading remote file: {0}, Modification Date: {1} {2} UTC, Size: {3} bytes", fullPath, item.ModificationTime.ToUniversalTime().ToShortDateString(), item.ModificationTime.ToUniversalTime().ToShortTimeString(), item.Size);
 ftp.GetFile(downloadDirectory, fullPath);

Log shows the full path looks to be valid...
Downloading remote file: /outgoing/ARPP.BACLR.CA.CATHAIMS.A00.180522051300.asc, Modification Date: 5/22/18 10:13 AM UTC, Size: 881 bytes

We're using blocking mode but other than that there aren't any unique properties.