error uploading file

[java]

Hi all,

cobian version: 11.2.0.582
for several years I have been transferring files using cobian from a local workstation to a remote FTP server. In fact, everything worked fine without any problems.
Until the beginning of March when everything stopped, rather the transfer of files which stopped but sessions and FTP access are possible.
So, I tested the upload with ftp://@ipserver, and it worked, and I was able to manually transfer files with the same configured user.
but with cobian this is no longer possible, I tried a reinstallation and without results.
here are the two results of the tests carried out from cobian and from a configured task.
I no longer understand knowing that this problem occurred on around fifty PCs out of 160 and that these PCs are in different local geographical positions.
thank you

test cobian.png (17.18 KiB) Viewed 115 times

00.png (35.49 KiB) Viewed 115 times

[cobian]

What kind of server are you using?

[java]

I'm using windows server 2012.
manually I upload the files using ftp://ip-server
but with cobian impossible and yet it worked for years.
no changes were made to the configurations.
other clients still continue to upload files with the same configuration and a single ftp server.

[cobian]

Very strange indeed. I have no done any changes to the FTP part for years now.

[java]

the problem is that the error is not very meaningful
I don't know if it's cobian, or OS Windows or FTP protocol....!!?