ORA-19812: cannot use string without DB_RECOVERY_FILE_DEST

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ORA-19812: cannot usestring withoutDB_RECOVERY_FILE_DEST
Cause: There are three possible cause for this error: 1) Theindicated parameter
was in use when no DB_RECOVERY_FILE_DEST parameter was encountered
while fetching the initialization parameter. 2) An attempt was made to set
indicated the parameter with the ALTER SYSTEM command when no DB_
RECOVERY_FILE_DEST was in use. 3) An attempt was made to clear DB_
RECOVERY_FILE_DEST with the ALTER SYSTEM command when the indicated
parameter was in use.
Action: Eliminateany incompatible parameter definitions.