501: Syntax error -- marker required for REST.

Explanation

A restart (REST) command was received by the FTP server and there was no server marker at which the file transfer is to be restarted. The REST command must have a marker that is coordinated within the client program for a restart to occur.

Note: The REST command should not be issued directly by the user.

System action

FTP continues.

User response

None.

System programmer response

Determine why the client program did not send the marker.