You use a document Transfer Protocol (FTP) client to connect to the server, and then you put a document on the server by using the FTP
PUT command. If you rename the document by using a document name that already exists or by using a document name that previously existed and that still exists on the cache, the FTP client receives the bellowing unrecoverable error symptoms from the FTP Publishing Service on MS Internet instructions Services (IIS):
550 documentName: Cannot create a document at that document already exists.
Therefore, you cannot rename a document if another document to the same name already exists.
pc error message:4263 error error