Custom Program going into error ORA-29283: invalid file operation ORA-06512: at "SYS.UTL_FILE", lin

+---------------------------------------------------------------------------+ MLI custom application: Version : 12.2 Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. XXMLI_ARCHIVE_FND_LOBS: MLI Generate File for Interface +---------------------------------------------------------------------------+ Current system time is 20-SEP-2017 21:44:14 +---------------------------------------------------------------------------+ **Starts**20-SEP-2017 21:44:14 **Ends**20-SEP-2017 21:44:14 ORA-29283: invalid file operation ORA-06512: at "SYS.UTL_FILE", line 536 ORA-29283: invalid file operation +---------------------------------------------------------------------------+ Start of log messages from FND_FILE +---------------------------------------------------------------------------+ fnd_trace start_trace...identifier: 0920_214414 sid/serial/module/action: 587/11/e:XXMLI:cp:xxmli/XXMLI_ARCHIVE_FND_LOBS/XXMLI/XXMLIINTUSER SET_IDENT_FOR_SESS: user: GR10278, requestID: 9271300 FND_TRACE.start_trace: Enabling trace ERROR: ORA-29283: invalid file operation ORA-06512: at "SYS.UTL_FILE", line 536