Toad 12.11 ORA-02248 on datafile maintenance (add/alter) in Oracle 12.1 non-CDB

I saw a similar thread on the beta forum. It performs the desired change, but always ends with the error. It just started in 12.11.

Spooled SQL:

ALTER DATABASE
DATAFILE ‘/db01/ORACLE/tundaimx/system01.dbf’
AUTOEXTEND ON
NEXT 1M
MAXSIZE 8G;

ALTER SESSION SET CONTAINER =;
Error: ORA-02248: invalid option for ALTER SESSION

Thanks, this is fixed for next beta. Sorry about that. The error is harmless and you can ignore it.