Oracle Message LPX-00269 - all three access functions (open/close/read) must be provided

ERRORall three access functions (open/close/read) must be provided
CAUSEAn attempt was made to set the access method callbacks, but all three functions were not provided.
ACTIONAll three callback functions (open, close, and read) are required. They must all be provided, even if they are stub functions which do nothing.