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For just a few seconds I had a strange experience on my simple home server (QNAP TS-210). I was copying many files and when I wanted to copy just another one (text file with .srt extension), I got an error 550 Function not implemented.

First, what I would like to ask is what exactly does this error message mean, because as I searched the Internet, I found two different error messages bound to one FTP 550 Error Code:

  1. Given by my server and for example here says "550 Function not implemented".
  2. Second (for example here) is "550 Requested action not taken. File unavailable (e.g., file not found, no access)".

That's quite two different meanings. How two error descriptions can be bound to one error code?

I have NASFTPD Turbo station 1.3.2e Server (ProFTPD) on server side and Total Commander on Windows 7, on client side. I wasn't able to copy / download this file neither in Total Commander nor directly in Windows.

I SSHed to my server using PuTTy, located this file, copied it to another directory, deleted it and then copied back to original place. After that I was able to copy this file to my local computer, without any problems, even using the same FTP session I left open in Total Commander.

So, second question is, what actually happend?

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closed as off-topic by Braiam, Anthon, slm, Zelda, Timo Feb 13 '14 at 6:23

This question appears to be off-topic. The users who voted to close gave this specific reason:

  • "Questions describing a problem that can't be reproduced and seemingly went away on its own (or went away when a typo was fixed) are off-topic as they are unlikely to help future readers." – Braiam, slm, Zelda, Timo
If this question can be reworded to fit the rules in the help center, please edit the question.

Have you checked out this threat? Are this file with an special ACL or Unix permissions? –  Braiam Feb 13 '14 at 5:24
I found solution myself. It was problem with file owner. cd to directory containing "problematic" file (or any parent one) and execute chown -R trejder * to change the owner of file to my own. Apparently copying file there and back again did something similar. I can't put that answer here, because you put question "on hold". Still can't understand, how questions related to file owners and file rights are off-topic in this site, but OK. No, I haven't checked out that thread, because I wasn't aware of it. Thanks for all, anyway. Cheers. –  trejder Feb 13 '14 at 11:38

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