I have not seen this error before, and have used Dreamweaver for many years. But, I am getting it very regularly (it is more than intermittent) since the last Dreameaver update. I am trying to ascertain if it is a Dreamweaver bug, or a Yahoo Web Hosting bug.
What happens is that I connect to my website over SFTP (sometimes I cannot even connect), and then try to upload a file and get the message "An FTP error occurred - cannot make connection to host. Internal data error. Failed to connect to server.".
However, and this is the really, really bad bit, the file that WAS on the server (i.e. the one that was to be replaced) seems to be REMOVED, i.e. *before* the update is applied (which it isn't because of the error). I don't know if Dreamweaver is somehow doing this or not, but it means that if you were, say, uploading a revision to your site's top level index.html file, that file is no longer there and any visitor to your site then sees the *entire* file structure of your site - potentially catastrophic.
I have tried clearing the Dreamweaver cache (http://www.dmxzone.com/go/16740/clearing-dreamweaver-s-cache/) but that makes no difference.
Is anyone else getting this or has found a solution to it (or identified where the problem is)?
Thanks in advance!
There have been a couple other posts about Yahoo and connection problems recently.
Have you tested uploading using another FTP program, like the Filezilla Client, yet?
If the problem happens there, it may just be a Yahoo issue. If it doesn't, at least your site will be up to date while troubleshooting continues with DW.
Thanks for the pointer John. I tried earlier with FileZilla and couldn't connect, either. But now I seem to be able to connect with both. Perhaps it is on the Yahoo end, after all. However, I still have no idea why files should be deleted BEFORE a file has been uploaded that can replace them - and I am not sure if that is a DW or Yahoo issue, either..... Thanks again...