>451 UnExpected reply code Failure writing to local file.
Due to one of the following reasons. You might want to check with system admins for the 451 error.
- The drive (on the FTP server that the file is being stored on) is full (or there isn't enough free space available for the file being sent)
- The user has a limit on the amount of disk space (on the FTP server) they can use (a quota) and they've reached that limit (or will surpass it with the file being sent)
- The permissions on the folder (on the FTP server) do not allow this user to store files in it .
You might also check these threads.. Search SCN for the similar error.