Work around for this issue is to increase the amount of space allocated to db_recovery_file_dest; e.g.,
$ sqlplus sys as sysdba SQL> show parameter db_recovery_file; db_recovery_file_dest string /opt/oracle/flash_recovery_area db_recovery_file_dest_size big integer 20G
Compare this with the output of ‘du -sh’; e.g.,
$ du -sh /opt/oracle/flash_recovery_area 21G /opt/oracle/flash_recovery_area
21 vs 20, so set it to something a bit bigger; e.g.,
SQL> alter system set db_recovery_file_dest_size = 30G;
Extracted from this link on Remedian.com.