ORA-16018
Cause
One of the following events caused an incompatibility: LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST parameter was in use when a LOG_ARCHIVE_DEST_n (n = 1...31) parameter was encountered while fetching initialization parameters.
An ALTER SYSTEM ARCHIVE LOG START TO command was in effect when a LOG_ARCHIVE_DEST_n parameter was encountered while fetching initialization parameters.
A LOG_ARCHIVE_DEST_n parameter was in use when an ALTER SYSTEM command was used to define a value for either the LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST parameter.
DB_RECOVERY_FILE_DEST parameter was in use when an attempt was made to use an ALTER SYSTEM or ALTER SESSION command to define a value for LOG_ARCHIVE_DEST or LOG_ARCHIVE_DUPLEX_DEST.
Action
Identify and remove any incompatible parameter definitions.