Oracle Error ORA-30431: refresh method must be ANY or INCREMENTAL or FORCE_FULL, not string

Oracle Error Message

ORA-30431: refresh method must be ANY or INCREMENTAL or FORCE_FULL, not string

Reason for the Error

An invalid refresh method was specified

Solution

Verify that the refresh method is one of ‘ANY’ or ‘INCREMENTAL’ or ‘FORCE_FULL’