Hi, I´ve tryien with selecting any other folder because I´ve read this solution before, but It doen´t seem to be the problem. I don´t know if this is a problem of configuration because the message of "You cannot delete this folder" appear on any folder created and testing it with protocol commands, so it is not a client problem.
Yes, it is. The client opened the folder, and then attempted to delete the folder while it is still open.
An opened folder cannot be deleted, while it's still open.
pgp00000.pgp
Description: PGP signature
