ORA-00337 Log file ‘%s’ does not exist and no size specified

Cause: An attempt to add a log found neither an existing file nor a size for creating the file. Action: Specify a size for the log file.

ORA-00306 Limit of %s instances in this database

Cause: Starting this instance would exceed the maximum number of instances allowed for this database. This message occurs only with STARTUP shared and multiple instances. Action: You cannot start more than the lower of a) port-specific limit as to the number of instances b) the number of instances specified at create-database time