ORA-01245 Offline file %s will be lost if RESETLOGS is done

Cause: Attempting to do an OPEN RESETLOGS with a file that will be lost because it is offline. The file was not taken offline with the FOR DROP option. Action: Either bring the file online and recover it, or take it offline with the FOR DROP option.

ORA-01240 Too many data files to add in one command

Cause: The command specifies adding more data files than can be done in one command. It is necessary to fit all the file names into one log entry, but that would make the entry too large. Action: If this is a CREATE TABLESPACE command, create with fewer files then add the other files later. If…