Can't append line from unnamed buffer to file opened

Hi,

Does somebody know why I cannot append a line from a unnamed buffer (current buffer) to a file that is opened in another buffer? I get the message that the file is opened in another buffer, even if I add the !

Thanks,

Alexandre

--
--
You received this message from the "vim_use" maillist.
Do not top-post! Type your reply below the text you are replying to.
For more information, visit http://www.vim.org/maillist.php

---
You received this message because you are subscribed to the Google Groups "vim_use" group.
To unsubscribe from this group and stop receiving emails from it, send an email to vim_use+unsubscribe@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.