Oracle Error Message
ORA-25109: standby lock name space has illegal character ‘string’
Reason for the Error
An invalid lock name space was specified for the standby database. The lock name space for the standby database can only contain A-Z, 0-9, ‘_’, ‘#’, ‘$’, ‘.’ and ‘@’ characters.
Solution
Change initialization parameter _STANDBY_LOCK_NAME_SPACE to a valid character string.