[Dovecot] 'NO' 'Unknown error'

[Nagy László]

  Dear List,

I'm writting a program in Python that connects to a dovecot server and 
copies/moves messages across different shared folders. The program 
throws an error while executing this IMAP command:

UID COPY 232 Archive/Notifications


The same program works fine with other directories and messages. This is 
the response from the dovecot server:

('NO', ['Unknown error'])

Do you have an idea what is the problem? This error message is very 
cryptic, it does not tell anythig about what is causing the problem and 
how to fix it.

By the way, I'm using dovecot-1.0.r7_2 on FreeBSD 6.1-RELEASE. I cannot 
upgrade to a newer - I had to downgrade to r7 before because dovecot did 
not find the inboxes of my POP3s users. (But it did find the same 
inboxes for my IMAPs users.)

Thanks,

   Laszlo